Question

The average of 5 consecutive numbers is n. If we include the next two numbers as well, the new average will be?

• A. n+2
• B. n+1
• C. n
• D. n+0.5
• E. Cannot be determined

Answer 1

The correct option is B n+1

Let the 5 numbers be – n-2, n-1, n, n+1 and n+2
Sum = 5n
If we include the next two numbers n+3 and n+4
The sum will be 5n+2n+7 = 7n+7
Average $=\frac{1}{7}\times 7n+7=n+1$