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प्रश्न
A bag contains some balls of which x are white, 2x are black and 3x are red. A ball is selected at random. What is the probability that it is white?
योग
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उत्तर
Total number of balls = (x + 2x + 3x) = 6x.
Number of white balls = x.
∴ P(getting a white ball) = `x/(6x) = 1/6`.
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अध्याय 19: Probability - EXERCISE 19 [पृष्ठ ९२९]
