Question

The arithmetic mean of 35 values is 45. What will be the new mean if each of these values is
(a) increased by 7?
(b) multiplied by 5?
(c) divided by 5?

Answer 1

Arithmetic mean = 45
(a) If each value is increased by 7, the mean will also be increased by 7.
New mean = 45+7 =52
(b) If each value is multiplied by 5, the mean will also be multiplied by 5.
New mean = 45$\times$5 =225
(c) If each value is divided by 5, the mean will also be divided by 5.
New mean = 45$÷$5 = 9