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Questions  >>  Olympiad-Math  >>  Class 8
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Q)

There are 15 balls numbered 1 to 15 in a bag. If a person selects one at random what is the probability that the number printed on the wall will be a prime number greater than 5?

$\begin{array}{1 1} \frac{1}{5} \\ \frac{2}{3} \\ \frac{4}{3} \\ \frac{5}{3} \end{array} $

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A)
Solution :
The prime between 5 and 15 are $7,11,13$
So the probability $=\large\frac{3}{5}$
$\qquad= \large\frac{1}{5}$
Answer : $\frac{1}{5}$
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