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Threre are 9 red,7 white and 4 black ba...

Threre are 9 red,7 white and 4 black balls in an urn.
If two balls are selected at random what is the probability that one ball is white and the other ball is red ?

A

`(91)/(190)`

B

`(63)/(190)`

C

`(5)/(19)`

D

`(4)/(95)`

Text Solution

Verified by Experts

The correct Answer is:
B
Total possible outcomes =190
favourable outcomes= selection of 1 ball out of 9 red balls and I ball from from 7 white balls
`=""^(9)C_(1)xx""^(7)C_(1) = 9 xx7=63`
`implies "Required probability "=(63)/(190)`
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