Question

The average of a list of 10 numbers is 15. if another number 48 is added to the list, what will be the average

Answer 1

write your question completely i cant understand

Answer 2

Answer:

Since average of 10 numbers is = 15

So sum of 10 numbers = 15×10 = 150

Now when 48 is added to the list

Then sum of 11 numbers = sum of 10 numbers + 48 = 150 + 48 = 198

So by formula, average of 11 numbers = sum of 11 numbers / 11

= 198/11 = 18