Question

the mean of three numbers is 4. If two of the numbers are 1 and 2 , then find the third number.

Answer 1

Hi...☺

Here is your answer...✌

Let the third number be x

Now,

Mean of three number = 4

Sum of all number/total numbers = 4

(1+2+x)/3 = 4

1+2+x = 12

x+3 = 12

x = 9

Hence the third number is 9

Thank you ⭐