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SSC MTS 2019 PYQ — Question 63

SSC MTS Previous Year - 02 August 2019 - Shift 1 • Quantitative Aptitude • Q63

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The average of 13 numbers is 42. If a 14th number is included, then the average becomes 44. What is the 14th number?

Show answer & explanation

Correct answer: A

Explanation

The correct answer is option 1 i.e. 70

Understanding

Application

Given:

The average of 13 numbers is 42;

Hence,

Sum of 13 numbers = 13 × 42 = 546

Average of 14 numbers = 44

Hence,

⇒ Sum of 14 numbers = 14 × 44 = 616

Now,

⇒ 14th number = 616 – 546 = 70