Cards bearing numbers 2, 3, 4,......,11 are kept in a bag. A card is drawn at random from the bag Find the probability of getting a card with a prime number.

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Solution

Prime numbers in 2, 3, 4, ...... 11 are $2, 3, 5, 7, 11$ .
Therefore, required probability = $\frac{5}{10} = \frac{1}{2}$

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Cards bearing numbers 2, 3, 4,......,11 are kept in a bag. A card is drawn at random from the bag Find the probability of getting a card with a prime number.

Prime numbers in 2, 3, 4, ...... 11 are 2,3,5,7,11.Therefore, required probability = 510=12

Prime numbers in 2, 3, 4, ...... 11 are $2, 3, 5, 7, 11$ .
Therefore, required probability = $\frac{5}{10} = \frac{1}{2}$