Given that i have 6 pairs of balls where each pair contains 2 balls of the same colour in the bag. So the bag would contain RR, GG, BB, PP, YY, WW (red, green, blue, pink, yellow, white).
Whats the probability of finding atleast one pair when
a) 1 Ball has been drawn out
b) 2 Balls have been drawn out
c) 3 Balls have been drawn out
d) 4 Balls have been drawn out
etc up to 12 balls in total,
I'm not necessarily looking for the answer but rather the methodology behind solving a problem like this.