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Question 2
If the average (arithmetic mean) of 5 consecutive integers is 11, what is the sum of the least and greatest of the 5 integers?
  1. 23
  2. 22
  3. 21
  4. 20
  5. 19
The correct Answer is 22 and the correct Choice is (B).

Explanatory Answer
The arithmetic mean of 5 consecutive integers is the 3rd integer or the middle number.

Therefore, if a1, a2, a3, a4 and a5 are the five consecutive integers, then a3 = 11

Hence, a1 = 9 and a5 = 13

Sum of the least and the greatest integer = a1 + a5 = 9 + 13 = 22.

Choice (B).
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