Question 25

The average of 7 consecutive numbers is 20. Then sum of smallest and greatest number is

We can assume the 7 consecutive numbers to be a-3, a-2, a-1, a, a+1, a+2, a+3

=> The sum of the numbers = 7a

=> The average of the numbers = 7a/7 = 20 => a = 20

The sum of the smallest and the largest number is a - 3 + a + 3 = 2a = 40.

=> Option-C

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