If the average of 54, 55, 57, 58, 59, 62, 62, 63, 65 and x is 60, what is the value of x?  Pick.
A) 60
B) 62
C) 64
D) 65
E) 66

Rationale: "sum of the deviations of the numbers in the set from the mean is always zero 54 , 55 , 57 , 58 , 59 , 62 , 62 , 63 , 65 mean is 60 so the list is - 6 - 5 - 3 - 2 - 1 + 2 + 2 + 3 + 5 . . . this shud total to zero but this is - 5 , hence we need a number that is 5 more than the mean to get a + 5 and make it zero hence the answer is 60 + 5 = 65 d"
Answer: D