the average of 10 numbers is 7 . if each number is multiplied by 12 , then the average of new set of numbers is	Answers.
A) 28
B) 236
C) 288
D) 84
E) 26

Rationale: explanation : if each number is multiplied by k , then the new average increases by k times . so new average = 84 answer : d
Answer: D