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SSC Selection Post 2022 PYQ — Question 75

SSC Selection Post - Matriculation Level 2022 - 7 Feb 2022 - Shift 2 • Quantitative Aptitude • Q75

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There are six numbers whose average is 120. If the sixth number is one-fourth of the sum of the remaining five numbers, then the sixth number is:

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Correct answer: C

Explanation

The correct answer is option 3 i.e. 144.

Let the sixth number = x

Total sum = 6 × 120 = 720

Then, the sum of the remaining 5 numbers = 720 − x

⇒ x = 14(720−x){1\over4}(720-x)

⇒ 4x = 720 - x

⇒ 5x = 720

⇒ x = 144