If the average of 744, 745, 747, 748, 749, 752, 752, 753, 755 and x is 750, what is the value of x? Choose the correct choice from the following answers.
A) 750
B) 752
C) 754
D) 755
E) 756

Rationale: "sum of the deviations of the numbers in the set from the mean is always zero 744 , 745 , 747 , 748 , 749 , 752 , 752 , 753 , 755 mean is 750 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 750 + 5 = 755 d"
Answer: D