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 numbers is:

Options

• 30

• 40

• 70

• 90

Answer 1

40

Explanation:

A.M. of 75 numbers = 35

Sum of 75 numbers = (75 × 35) = 2625

Total increase = (75 × 5) = 375

Increased sum = (2625 + 375) = 3000

Increased average = `3000/75` = 40