A bag contains 12 balls out of which x are white.

If one ball is drawn at random, what is the probability that it will be a white ball?

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x 22

x 2

x 52

x 12

answer is D.

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Detailed Solution

Given that a bag contains 12 balls out of which x are white.
We have to find the probability that it will be a white ball if it is drawn at random.
For an event E, probability is given by,

P E = Number of favourable outcomes n(E) Total number of outcomes n(S)

Therefore, the probability that the randomly drawn ball is a white ball is,

P E = x 12

So, the probability that the randomly drawn ball is a white ball is

x 12

.
Thus, option 4 is correct.

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