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A bag contains 8 white and some black balls.
The probability of drawing a black ball is $\frac{3}{5}$ .
How many black balls are in the bag?

Class 8ProbabilityData Handling

A13
B11
C24
D12

Step-by-Step Solution

Let black =

b

. P(black) =

\frac{b}{8 + b} = \frac{3}{5}

. So

5 b = 3 (8 + b) = 24 + 3 b, 2 b = 24, b = 12

.

Answer: D) 12

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