Question

The average of 3 number is36, and the average of 2 number is 48 then what is the 3rd number?

Answer 1

Hi...
the sum of 3 numbers=36×3=108
the sum of 2 numbers=48×2=96
the 3rd=108_96=12

Answer 2

36×3=108
48×2=96
108-96=12