Question by Summer Clouds - Discuss with MathYouLike

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19/10/2017 at 14:12

A number is selected at random from the first 20 positive integers. What is the probability the number selected is an odd prime number? Express your answer as a percent.

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ForOver Coordinator 19/10/2017 at 16:12

Let's take the frist 20 positive intergers 1 to 20.

The number of odd prime numbers : 3;5;7;11;13;17;19.

The probability is : \(\dfrac{7}{20}\cdot100\%=35\%\)
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