Question

The average of three numbers is 29. The average of two of these numbers is 38. What is the third number?

Answer 1

Answer:

The sum of the three numbers =29*3 = 87. If the average of two numbers = 38, their sum = 2*38 = 76. So the third number is 87–76 = 11

Answer 2

Answer:

the third number is 11 for the given problem