Question

A bag contains 7 red and 2 white balls and another bang contains 5 red and 4 white balls. Two balls are drawn, one from each bag. The probability that both the balls are white, is

Answer 1

No.of favourable outcome 18

Probability that both balls are white=6/18

Answer 2

For bag one is 2 /7

For second bag is 4/5

For total white balls is 6/ 18

i.e 1/2.