A bag contains 50 coins and each coin is marked from 51 to 100. One coin is picked at random.

The probability that the number on the coin is not a prime number, is

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Solution

Total number of coins (n)=50

Prime numbers between 51 to 100 are 53, 59,61, 67,71,73, 79, 83, 89, 97=10

$∴$ Probability P(A) = $\frac{m}{n} = \frac{40}{50} = \frac{4}{5}$

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A bag contains 50 coins and each coin is marked from 51 to 100. One coin is picked at random. The probability that the number on the coin is not a prime number, is

Total number of coins (n)=50 Prime numbers between 51 to 100 are 53, 59,61, 67,71,73, 79, 83, 89, 97=10 ∴ Probability P(A) =mn=4050=45

A bag contains 50 coins and each coin is marked from 51 to 100. One coin is picked at random.

The probability that the number on the coin is not a prime number, is

Total number of coins (n)=50

Prime numbers between 51 to 100 are 53, 59,61, 67,71,73, 79, 83, 89, 97=10

$∴$ Probability P(A) = $\frac{m}{n} = \frac{40}{50} = \frac{4}{5}$