Question

The arithmetic mean of 12,15,x,19 and 20 is 16.Then the value of x is

A) 14 B) 18

C) 15 D) 16​

Answer 1

Answer:

Option A : 14

Step-by-step explanation:

Method is to calculate arithmetic mean is  add up all the values and divide the sum by the number of values.

Given that,

$\frac{12+15+x+19+20}{5} =16$

By adding all the numbers on left side and multiply 5 by 16 on right side (By taking 5 to the right), we  get

$66+x=80$

$x= 80-66$

$x=14$

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