The average of 8 numbers is 21. If each of the number is multiplied by 8, the average of the new set of numbers is :
Choose the correct choice from the following options
A) 168
B) 667
C) 288
D) 1991
E) 111

Rationale: "average of new numbers = ( 21 × 8 ) = 168 answer : a"
Answer: A