The average (arithmetic mean) of 14, 32, and 53 is 3 more than the average of 21, 47, and x. What is x?	Choose the correct choice from the following:  A) 20  B) 21  C) 22  D) 23  E) 24

Rationale: "the average of 14 , 32 , and 53 is 33 . the average of 21 , 47 and x is 30 . then 21 + 47 + x = 90 . x = 22 . the answer is c ."
Answer: C