John found that the average of 15 numbers is 40. If 10 is added to each number then the mean of number is?
Choose the correct choice from the following.
A) 50  B) 45  C) 65  D) 78  E) 64
(x+x1+...x14)/15 = 40   50   Option 50
<result>A</result>
John found that the average of 15 numbers is 40. If 10 is added to each number then the mean of number is?