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SSC MTS 2019 · PYQ · Average · medium

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

  1. A.66
  2. B.62
  3. C.68
  4. D.70✓ Correct

Explanation

Sum of 13 numbers = 13×42 = 546. Sum of 14 numbers = 14×44 = 616. The 14th number = 616–546 = 70.
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