Question

A bag contains 7 white, 5 black and 4 red balls. If two balls
are drawn at random, find the probability that
i. both the balls are white
ii. one ball is black and the other red
iii. both the balls are of the same colour

Answer 1

White balls=7

Black balls=5

Red balls=4

Total balls=16

2. P(E)= one black and one red=5\16*4\15= 0.083

3.P(E)=there could be 3 outcomes i.e

            7\16

            5\16

             AND

          4\16=1\4

Sorry, I tried to think about the first part but wasn't able to solve.

Sorry for the inconvenience.