Question

the mean of three numbers is 12 two of the number are 9and 14 what is the third number​

Answer 1

Answer:

We know Average = sum of numbers/no. of numbers

Sum of numbers = average × no. of numbers

Sum of three numbers = 12 × 3 = 36

Sum of first two numbers = 15 + 10 = 25

The third number = sum of three numbers - sum of two numbers

Third number = 36 - 25 = 11

Thus, the third number is 11

Answer the third number is 11