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SSC CGL 2022 PYQ — Question 65

SSC CGL - 12 April 2022 - Shift 2 • Quantitative Aptitude • Q65

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What is the average of all the prime numbers between 70 and 90?

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Correct answer: C

Explanation

The correct answer is option 3 i.e. 79.

Explanation:

In between 70 to 90, all prime numbers = 71,73,79,83,89

Now, required average = (71+73+79+83+89)5(71+73+79+83+89) \over 5 = 3955=79{395\over 5} = 79

Hence the average of all prime numbers between 70 and 90 is 79.