5 pairs of two ball (1 white 1 red) are available. We have to select 1 white and 1 red ball. Probabi

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26 Jul 2011 white and red ball

5 pairs of two ball (1 white 1 red) are available. We have to select 1 white and 1 red ball. Probability to select both the balls of same pair will be?

OPtion

1) 1/2
2) 2/3
3) 3/4
4) 1/4
5) 2/5
6) 1/5
7) 2/7
8) 1/9
9) 3/10
10) none of these

Solution

Any of the ball can be selected in 1st attempt.
In second attempt we have to select a ball from the same pair.
Its probability will be 1/5

Correct Option: 6 Best Solution (1)