Question

5. The mean of 15 number is 5. If 5 is added to each number, then what is the new mean or average?​

Answer 1

Answer:

10

Say the sum of those 15 numbers is x

Average =x/15

5=x/15

Now when 5 is added to all numbers

Average =(x+5*15)/15

=(x+75)/15

=x/15+75/15

=5+5

=10