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 options:  A) 750  B) 752  C) 754  D) 755  E) 756
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= 
<gadget id="calculator"> 750 + 5</gadget>
<output>755</output>
755   755
<result>D</result>
If the average of 744, 745, 747, 748, 749, 752, 752, 753, 755 and x is 750, what is the value of x?