Question

Find the arthemetic mean of 6,10,x,12 is 8find the value of x

Answer 1

Arithmetic mean of n numbers = (sum of numbers) ÷ (n)

=> (6 + 10+ x +12)÷8 = 3.5

=> 28 + x = 5*8

=> x = 40 - 28

=> x = 12