The average of five numbers is 7. If three new numbers would be added, then the

Question

The average of five numbers is 7. If three new numbers would be added, then the new average comes out to be 8.5. What is the average of those three new numbers?

Options:

A . 10.5

B . 11

C . 9

D . 11.5

Answer: Option B
Answer: (b)Sum of three new numbers = 8 × 8.5 – 7 × 5 = 68 – 35 = 33 ∴ Required average = $33/3$ = 11

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