Question

From a bag containing 10 black and 20 white balls a ball is drawn at a at random what is the probability that it is a black

Answer 1

no. of black balls/no. of total balls=10/30=1/3
So,1/3 is the probability of black balls.
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Answer 2

Answer:

The probability of a black ball is 1/3.

Step-by-step explanation:

As per the data given in the question,

We have,

No.of balck balls = 10

No. of white balls = 20

Total no of balls = 10+20 = 30

As we know,

$probability=\frac{no \:of \:favourable\: outcomes}{total\: no \:of \:outcomes}$

So, no of favourable outcomes = 10 (black balls)

Total outcomes= 30 (total balls)

Hence,

$Probability =\frac{10}{30} =\frac{1}{3}$

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