Mathematics

A bag contains 5 white, 2 red and 3 black balls. A ball is drawn at random. What is the probability that the ball drawn is red ball?

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Total number of balls = 5 + 2 + 3 = 10

So, the total number of possible outcomes = 10

There are 2 red balls.

∴ Number of favourable outcomes = 2

P(getting a red ball) = $\dfrac{\text{No. of favourable outcomes}}{\text{No. of possible outcomes}} = \dfrac{2}{10} = \dfrac{1}{5}$ .

Hence, probability of getting a red ball = $\dfrac{1}{5}$ .

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