Question

The mean of 15 numbers is 8.if 2 is added to every number what is the new mean

Answer 1

I think 10 is the correct answer

Answer 2

Let sum be x.
Total sum ÷ no. of terms=mean
Hence x÷15=8
x=120.

Now,
For 1 number, we add 2
Hence, for 15 numbers, we add 30.

Hence, mean(new)=(x+30)÷15
=(120+30)÷15
=150÷15
=10