The average of X numbers is 5. If Y is added to each number, the average will be?

please explain
(medal for a good answer)

Question

The average of X numbers is 5. If Y is added to each number, the average will be?

please explain 
(medal for a good answer)

anonymous · Answer

If the average of x numbers is 5 then the sum of those numbers is 5x.

Example   2 3 4 5 6 7 8    have an average of 5 and a sum of 35 which is 7(5)

so the sum would be    5x + y

Then to find the average = you have x numbers that had an average of 5 plus you added one more number (y) to the sum so you now have x + 1 numbers

Average is       5x + y
                       ------
                         x + 1

anonymous · Answer

youre adding x*y though if you add y to x numbers so the total is 5x+xy.  And the average is still of x numbers.  So  (5x+xy)/(x)=5+y

anonymous · Answer

You are correct... I read the problem wrong..  good one..