A number is chosen at random from the list of prime numbers less than $50$ . The chance that it has its square greater than $100$ is

1 / 5

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4 / 5

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3 / 5

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11 / 15

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Solution

The correct option is C $11 / 15$
Total prime no.s till $50 = 15$
if square of a prime no is greater than $100$ , this means that no. is greater than $10$ .
Therefore, number of primes between $10$ and $50 = 11$
$\Rightarrow P = 11 / 15$

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A number is chosen at random from the list of prime numbers less than 50. The chance that it has its square greater than 100 is

The correct option is C 11/15Total prime no.s till 50=15if square of a prime no is greater than 100, this means that no. is greater than 10.Therefore, number of primes between 10 and 50=11⇒P=11/15

A number is chosen at random from the list of prime numbers less than $50$ . The chance that it has its square greater than $100$ is

The correct option is C $11 / 15$
Total prime no.s till $50 = 15$
if square of a prime no is greater than $100$ , this means that no. is greater than $10$ .
Therefore, number of primes between $10$ and $50 = 11$
$\Rightarrow P = 11 / 15$