Question

The average of four numbers is 36. Three of them are 34, 40 and 38. Find the fourth number

Answer 1

The fourth number is 32.

Explanation:

`36 = (34 + 40+38+x)/(4) \\36 = (112+x)/(4) \\36 * 4= 112+x\\144= 112+x\\144= 112+x\\144-112= x\\32=x\\\\So..\\x=32`