Question

The average of 5 numbers is 25. If 10 is added to each number, then what is the new average ?

• A. 25
• B. 125
• C. 35
• D. 30

Answer 1

The correct option is C 35

$Average=\frac{Sumofallquantities}{Numberofquantities}$
$25=\frac{Sumofallquantities}{5}$
Sum of all quantitiess = 25$\times$ 5 = 125
Given, 10 is added to each number
$⟹$New sum= (old sum )+ ( 10$\times$Number of quantities)
= 125+ (10$\times$5) = 125+50 = 175
$\therefore$ New average= $\frac{Newsum}{5}$= $\frac{175}{5}$ = 35