Question

A bag contains 2 red, 3green, 2blue balls. two balls are drawn at random. what is probability that none of balls drawn is blue

Answer 1

Hope it helps.............

Answer 2

Total Balls = 2 + 3 + 2 = 7

Two Balls can be selected from 7 balls in 7C2 = 21 ways.

We want to find out the number of ways in which no blue hole is selected

Both the Balls Are selected from Red Green set of 5 balls.

2 balls can be selected from The Red- Green set in 5C2 = 10 Ways.

Required probability = 10 Upon 21.