If the arithmetic mean of seventy five numbers is calculated, it is 35. If each

Question

If the arithmetic mean of seventy five numbers is calculated, it is 35. If each number is increased by 5, then mean of new number is:

Options:

A . 30

B . 40

C . 70

D . 90

Answer: Option B

A.M. of 75 numbers = 35Sum of 75 numbers = 75 * 35 = 2625Total increase = 75 * 5 = 375Increased sum = 2625 + 375 = 3000Increased average = 3000/75 = 40.

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