The average of 10 numbers is - If the sum of 6 of them is 100, what is the ; average of the other 4?

A -100

B -50

C 0

D 50

Solution

Correct Answer: Option B

let, sum of 6 of them=x=100

The sum of 4 of them=y so,x+y/10=-10 y=100 so average=-200/4=-50