the average of 10 numbers is 7 . if each number is multiplied by 10 , then what is the average of the new set of numbers ?	Choose the correct choice from the following answers.
A) 7  B) 17  C) 70  D) 100  E) 107

Rationale: the sum of the ten numbers is 7 * 10 = 70 if each number is multiplied by 10 , the new sum is 10 * ( 70 ) . the average is then 10 * 7 = 70 the answer is c .
Answer: C