Question

Among four numbers mean of first two numbers is 4 mean of the first three numbers is 9 and mean of all four numbers is 15 one of the number is 12 find the other 3 numbers

Answer 1

Hello guys Namaste,

The sum of four numbers = 4

and the sum of first two numbers = 9

Then the third number 9-4 = 5.

is the right answer.