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A box contains 7 red balls, 8 green ball...

A box contains 7 red balls, 8 green balls and 5 white balls. A ball is drawn at random from the box. Find the probability that the ball is white.

A

`1/4`

B

`11/23`

C

`15/23`

D

`12/23`

Text Solution

Verified by Experts

The correct Answer is:
D
`P((H)/(W))=(P(W//H)xxP(H))/(P(W//T).P(T)+(W//H).P(H))`
`=(1/2((3)/(2)xx1+2/5xx1/2))/(23//30)=12/23`
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