Change the probability of a number appearing

I am making a fruit machine for an IT course at school. But i cant figure out how to make it so some fruits are less likely than others.
Also i cant figure out how to do a hold, with that i have just created the chance of holding, but not actually holding.
but what i mainly want to know is how to make certain numbers(1-9) less/more probable to appear.
Heres My Code:
__________________________________________________ ____________________
program fruitmachine;

uses crt;

var bet,semibank,spin,bank,winings,yahoo,endscreen,end screenwin,mulitplier,holdyn,checker,check,check1,w ritten,blob,hold5050,rand:integer;
var fruit : array[1..9] of string;

begin
repeat
cursoroff;
//Initialising fruits
fruit[1]:=' cherry ';
fruit[2]:=' banana ';
fruit[3]:=' lemon ';
fruit[4]:=' orange ';
fruit[5]:=' bar ';
fruit[6]:=' melon ';
fruit[7]:=' coconut ';
fruit[8]:=' bell ';
fruit[9]:=' butter ';

//writing of reels:
gotoxy(25,10);
write(char(201));
write(char(205));
write(char(205));
write(char(205));
write(char(205));
write(char(205));
write(char(205));
write(char(205));
write(char(205));
write(char(205));
write(char(205));
write(char(203));
write(char(205));
write(char(205));
write(char(205));
write(char(205));
write(char(205));
write(char(205));
write(char(205));
write(char(205));
write(char(205));
write(char(205));
write(char(203));
write(char(205));
write(char(205));
write(char(205));
write(char(205));
write(char(205));
write(char(205));
write(char(205));
write(char(205));
write(char(205));
write(char(205));
write(char(187));

gotoxy(25,11);
write(char(186));
gotoxy(36,11);
write(char(186));
gotoxy(47,11);
write(char(186));
gotoxy(58,11);
write(char(186));

gotoxy(25,12);
write(char(186));
gotoxy(36,12);
write(char(186));
gotoxy(47,12);
write(char(186));
gotoxy(58,12);
write(char(186));

gotoxy(25,13);
write(char(186));
gotoxy(36,13);
write(char(186));
gotoxy(47,13);
write(char(186));
gotoxy(58,13);
write(char(186));

gotoxy(25,14);
write(char(186));
gotoxy(36,14);
write(char(186));
gotoxy(47,14);
write(char(186));
gotoxy(58,14);
write(char(186));

gotoxy(25,15);
write(char(186));
gotoxy(36,15);
write(char(186));
gotoxy(47,15);
write(char(186));
gotoxy(58,15);
write(char(186));

gotoxy(25,16);
write(char(186));
gotoxy(36,16);
write(char(186));
gotoxy(47,16);
write(char(186));
gotoxy(58,16);
write(char(186));

gotoxy(25,17);
write(char(186));
gotoxy(36,17);
write(char(186));
gotoxy(47,17);
write(char(186));
gotoxy(58,17);
write(char(186));

gotoxy(25,18);
write(char(186));
gotoxy(36,18);
write(char(186));
gotoxy(47,18);
write(char(186));
gotoxy(58,18);
write(char(186));

gotoxy(25,19);
write(char(186));
gotoxy(36,19);
write(char(186));
gotoxy(47,19);
write(char(186));
gotoxy(58,19);
write(char(186));

gotoxy(25,20);
write(char(200));
write(char(205));
write(char(205));
write(char(205));
write(char(205));
write(char(205));
write(char(205));
write(char(205));
write(char(205));
write(char(205));
write(char(205));
write(char(202));
write(char(205));
write(char(205));
write(char(205));
write(char(205));
write(char(205));
write(char(205));
write(char(205));
write(char(205));
write(char(205));
write(char(205));
write(char(202));
write(char(205));
write(char(205));
write(char(205));
write(char(205));
write(char(205));
write(char(205));
write(char(205));
write(char(205));
write(char(205));
write(char(205));
write(char(188));
//end of writing blank reels
//instructions:
gotoxy(60,10);
write('INSTRUCTIONS:');
gotoxy(60,11);
write('-type 4 to quit');
gotoxy(60,12);
write('-type 01 to to bank');
gotoxy(60,13);
write('your money');
gotoxy(60,14);
write('to hold...');
gotoxy(60,15);
write('YOU MUST BET OVER 5!');

repeat
gotoxy(30,4);
write('place a bet');
cursoron;
gotoxy(30,5);
write(' ');
gotoxy(30,5);
read(bet);

cursoroff;
//to BANK:
if bet = 01 then
begin
winings:=semibank;
end;
until (bet > 5) or (bet = 4);
//resetting the spin:
spin:=0;

//if bet is 4 it skips to end scene(0 is the quit function)
//at first i tried to do it with an IF statement, but it disabled
//the ability to play the game. i then, whilst writing these notes, the
//repeat-until did the job just fine.
//'spinning' animation:
if bet > 5 then
begin
repeat

//randomizer
//left reel
randomize;
rand:=random(8);
rand:=rand+1;
gotoxy(26,15);
if rand = 1 then
begin
checker:=1;
write(fruit[1]);
end;
if rand = 2 then
begin
checker:=2;
write(fruit[2]);
end;
if rand = 3 then
begin
checker:=3;
write(fruit[3]);
end;
if rand = 4 then
begin
checker:=4;
write(fruit[4]);
end;
if rand = 5 then
begin
checker:=5;
write(fruit[5]);
end;
if rand = 6 then
begin
checker:=6;
write(fruit[6]);
end;
if rand = 7 then
begin
checker:=7;
write(fruit[7]);
end;
if rand = 8 then
begin
checker:=8;
write(fruit[8]);
end;
if rand = 9 then
begin
checker:=9;
write(fruit[9]);
end;
//center reel
rand:=random(8);
rand:=rand+1;
gotoxy(37,15);
if rand = 1 then
begin
check:=1;
write(fruit[1]);
end;
if rand = 2 then
begin
check:=2;
write(fruit[2]);
end;
if rand = 3 then
begin
check:=3;
write(fruit[3]);
end;
if rand = 4 then
begin
check:=4;
write(fruit[4]);
end;
if rand = 5 then
begin
check:=5;
write(fruit[5]);
end;
if rand = 6 then
begin
check:=6;
write(fruit[6]);
end;
if rand = 7 then
begin
check:=7;
write(fruit[7]);
end;
if rand = 8 then
begin
check:=8;
write(fruit[8]);
end;
if rand = 9 then
begin
check:=9;
write(fruit[9]);
end;
//right reel
rand:=random(8);
rand:=rand+1;
gotoxy(48,15);
if rand = 1 then
begin
check1:=1;
write(fruit[1]);
end;
if rand = 2 then
begin
check1:=2;
write(fruit[2]);
end;
if rand = 3 then
begin
check1:=3;
write(fruit[3]);
end;
if rand = 4 then
begin
check1:=4;
write(fruit[4]);
end;
if rand = 5 then
begin
check1:=5;
write(fruit[5]);
end;
if rand = 6 then
begin
check1:=6;
write(fruit[6]);
end;
if rand = 7 then
begin
check1:=7;
write(fruit[7]);
end;
if rand = 8 then
begin
check1:=8;
write(fruit[8]);
end;
if rand = 9 then
begin
check1:=9;
write(fruit[9]);
end;
delay(100);
spin:=spin+1;
until spin = 25;

end;

//randomizer for HOLDING
randomize;
hold5050:=random(1)+1;

//randomizer
//left reel
randomize;
rand:=random(8);
rand:=rand+1;
gotoxy(26,15);
if rand = 1 then
begin
checker:=1;
write(fruit[1]);
end;
if rand = 2 then
begin
checker:=2;
write(fruit[2]);
end;
if rand = 3 then
begin
checker:=3;
write(fruit[3]);
end;
if rand = 4 then
begin
checker:=4;
write(fruit[4]);
end;
if rand = 5 then
begin
checker:=5;
write(fruit[5]);
end;
if rand = 6 then
begin
checker:=6;
write(fruit[6]);
end;
if rand = 7 then
begin
checker:=7;
write(fruit[7]);
end;
if rand = 8 then
begin
checker:=8;
write(fruit[8]);
end;
if rand = 9 then
begin
checker:=9;
write(fruit[9]);
end;
//center reel
rand:=random(8);
rand:=rand+1;
gotoxy(37,15);
if rand = 1 then
begin
check:=1;
write(fruit[1]);
end;
if rand = 2 then
begin
check:=2;
write(fruit[2]);
end;
if rand = 3 then
begin
check:=3;
write(fruit[3]);
end;
if rand = 4 then
begin
check:=4;
write(fruit[4]);
end;
if rand = 5 then
begin
check:=5;
write(fruit[5]);
end;
if rand = 6 then
begin
check:=6;
write(fruit[6]);
end;
if rand = 7 then
begin
check:=7;
write(fruit[7]);
end;
if rand = 8 then
begin
check:=8;
write(fruit[8]);
end;
if rand = 9 then
begin
check:=9;
write(fruit[9]);
end;
//right reel
rand:=random(8);
rand:=rand+1;
gotoxy(48,15);
if rand = 1 then
begin
check1:=1;
write(fruit[1]);
end;
if rand = 2 then
begin
check1:=2;
write(fruit[2]);
end;
if rand = 3 then
begin
check1:=3;
write(fruit[3]);
end;
if rand = 4 then
begin
check1:=4;
write(fruit[4]);
end;
if rand = 5 then
begin
check1:=5;
write(fruit[5]);
end;
if rand = 6 then
begin
check1:=6;
write(fruit[6]);
end;
if rand = 7 then
begin
check1:=7;
write(fruit[7]);
end;
if rand = 8 then
begin
check1:=8;
write(fruit[8]);
end;
if rand = 9 then
begin
check1:=9;
write(fruit[9]);
end;

gotoxy(26,15);
//For 3 the same
if checker = check and check1 then
begin
if checker = 1 then
begin
mulitplier:=3;
end;
if checker = 2 then
begin
mulitplier:=4;
end;
if checker = 3 then
begin
mulitplier:=5;
end;
if checker = 4 then
begin
mulitplier:=6;
end;
if checker = 5 then
begin
mulitplier:=7;
end;
if checker = 6 then
begin
mulitplier:=8;
end;
if checker = 7 then
begin
mulitplier:=9;
end;
if checker = 8 then
begin
mulitplier:=10;
end;
if checker = 9 then
begin
mulitplier:=20;
end;
bet:=bet*mulitplier;

end;
//For rell 1 and 2 the same
if checker = check then
begin
if checker = 1 then
begin
mulitplier:=2;
end;
if checker = 2 then
begin
mulitplier:=3;
end;
if checker = 3 then
begin
mulitplier:=4;
end;
if checker = 4 then
begin
mulitplier:=5;
end;
if checker = 5 then
begin
mulitplier:=6;
end;
if checker = 6 then
begin
mulitplier:=7;
end;
if checker = 7 then
begin
mulitplier:=8;
end;
if checker = 8 then
begin
mulitplier:=9;
end;
if checker = 9 then
begin
mulitplier:=10;
end;
bet:=bet*mulitplier;

end;
//For reel 1 and 3 the same
if checker = check1 then
begin
if checker = 1 then
begin
mulitplier:=2;
end;
if checker = 2 then
begin
mulitplier:=3;
end;
if checker = 3 then
begin
mulitplier:=4;
end;
if checker = 4 then
begin
mulitplier:=5;
end;
if checker = 5 then
begin
mulitplier:=6;
end;
if checker = 6 then
begin
mulitplier:=7;
end;
if checker = 7 then
begin
mulitplier:=8;
end;
if checker = 8 then
begin
mulitplier:=9;
end;
if checker = 9 then
begin
mulitplier:=10;
end;
bet:=bet*mulitplier;

end;
//For reel 2 and 3 the same
if check = check1 then
begin
if check = 1 then
begin
mulitplier:=2;
end;
if check = 2 then
begin
mulitplier:=3;
end;
if check = 3 then
begin
mulitplier:=4;
end;
if check = 4 then
begin
mulitplier:=5;
end;
if check = 5 then
begin
mulitplier:=6;
end;
if check = 6 then
begin
mulitplier:=7;
end;
if check = 7 then
begin
mulitplier:=8;
end;
if check = 8 then
begin
mulitplier:=9;
end;
if check = 9 then
begin
mulitplier:=10;
end;
if mulitplier > 1 then
begin
bet:=bet*mulitplier;

end else
begin
bet:=0;
end;

end;



semibank:=semibank+bet;
gotoxy(2,10);
cursoron;
write('you have ',bet,' pounds!');
gotoxy(2,11);
write('you have ',winings,' secured');









until bet = 4;
gotoxy(2,15);
if bet > 0 then
begin
if bank = 0 then
begin
winings:=bet;
end;
write('you won ',winings,'pounds!');
gotoxy(2,16);

end;
clrscr;
repeat
if winings > 0 then
begin
if winings > 500 then
begin
repeat
gotoxy(37,12);
write('YOU WON ',winings,' POUNDS');
endscreenwin:=endscreenwin+1;
until endscreenwin = 100;
end;
end;
gotoxy(35,12);
write('G');
delay(100);
write('A');
delay(100);
write('M');
delay(100);
write('E');
delay(100);
write(' ');
delay(100);
write('O');
delay(100);
write('V');
delay(100);
write('E');
delay(100);
write('R');
delay(1000);
gotoxy(35,12);

write(' ');
delay(01);
if winings > 500 then
begin

repeat

gotoxy(2,2);
write(' YAhoo YAhoo Yahoo YAhooo YAhooo');
gotoxy(2,4);
write(' YAhoo YAhoo Yahoo YAhooo YAhooo');
gotoxy(2,6);
write(' YAhoo YAhoo Yahoo YAhooo YAhooo');
gotoxy(2,8);
write(' YAhoo YAhoo Yahoo YAhooo YAhooo');
gotoxy(2,10);
write(' YAhoo YAhoo Yahoo YAhooo YAhooo');
gotoxy(2,14);
write(' YAhoo YAhoo Yahoo YAhooo YAhooo');
gotoxy(2,16);
write(' YAhoo YAhoo Yahoo YAhooo YAhooo');
gotoxy(2,18);
write(' YAhoo YAhoo Yahoo YAhooo YAhooo');
gotoxy(2,20);
write(' YAhoo YAhoo Yahoo YAhooo YAhooo');
gotoxy(2,22);
write(' YAhoo YAhoo Yahoo YAhooo YAhooo');
delay(100);
gotoxy(2,2);
write(' ');
gotoxy(2,4);
write(' ');
gotoxy(2,6);
write(' ');
gotoxy(2,8);
write(' ');
gotoxy(2,10);
write(' ');
gotoxy(2,14);
write(' ');
gotoxy(2,16);
write(' ');
gotoxy(2,18);
write(' ');
gotoxy(2,20);
write(' ');
gotoxy(2,22);
write(' ');
yahoo:=yahoo+1;
delay(100);
until yahoo = 100;
end;
endscreen:=endscreen+1;
until endscreen = 1000;
gotoxy(23,5);
write('press enter to quit');
read(bet);

end.

__________________________________________________ ____________________
Thanks in advance
~megamidge11