Question

a bag contains 4 black, 5 red and 6 pink ball if 3 balls are selected one after the other without repacement what is the probability that 3 red balls are chosen?

Answer 1

so you have 15 balls to choose at start
and after you choose the first ball there are 14 balls remained

so you have 14 choices at second round

Answer 2

Thanks eric789non

Answer 3

wlecome