Question

the mean of 3 number is 12. two numbers are 9 and 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

Answer 2

Answer:

13 is the third number.

Step-by-step explanation:

Mean= sum of observations / number of observations

= 9+14+x / 3 = 12

= 23+x / 3=12

=23+x=12*3

=23+x=36

x=36-23

x=13

Hopefully it will help.......