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Q.

A bag contains 5 red, 8 black and 7 white balls. Is chosen at random. The probability that the chosen ball is black is:


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a

2 3

b

2 5

c

3 5

d

1 3  

answer is B.

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Detailed Solution

Given a bag contains 5 red, 8 black and 7 white balls.
Number of black balls = 8
And, total number of outcome = 20
Now, the probability that the chosen ball is black is,
= Number of black balls Total number of outcomes = 8 20
= 2 5
The probability is 2 5 .
Hence, option 2 is correct.
 
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