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प्रश्न
A box contains cards numbered from 1 to 20. A card is drawn at random from the box. Find the probability that the number on the drawn card is a prime number.
संख्यात्मक
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उत्तर
Total number of cards in the box = 20.
Prime number from among given numbers are 2, 3, 5, 7, 11, 13, 17, 19.
Number of these prime numbers = 8.
∴ P(getting a prime number) = `8/20 = 2/5`.
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अध्याय 19: Probability - EXERCISE 19 [पृष्ठ ९३०]
