Question

The average of 4 number is 45. Three of the number are 45, 55,56. Find the fourth number

Answer 1

Answer:

Let the fourth number be 'x'

The average of four numbers = 45

I.e.,(x+45+55+56)/4 = 54

(x+45+55+56) = 4×45

x + 156 = 180

x = 180 - 156

x = 24 ...

So,the fourth number will be 24.

I hope it will help.