Question

Box contains 6 balls which may be all of different colours or three each of two colours or to each of three different colours number of ways of selecting 3 balls from the box if ball of same colour are identical is

Answer 1

Probability = No. fav. outcomes/total no. of outcomes

Case 1:

when every balls are different in colour.

p(3 identical balls)= 0/6 => 0

Case 2:

Three identical balls of two non identical set of colours.

P(3 identical balls) =2/20 => 0.1