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SSC CHSL 2023 PYQ — Question 70

SSC CHSL - 07 Aug 2023 - Shift 4 • Quantitative Aptitude • Q70

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The difference between 24 and the mean proportional of 7 and 63 is:

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Correct answer: A

Explanation

The correct answer is option 1 i.e. 3.

Let x be the mean proportion then,

⇒ 7/x = x/63

⇒ x2 = 7×63\sqrt{7\times63}

⇒ x = 7 × 3 = 21 cm

Thus, the difference = 24 - 21 = 3