Question

If the average of 120 observations is 27, the sum of all observations is .

• A. 324
• B. 3240
• C. 4.44
• D. 44.44

Answer 1

The correct option is B 3240

Average = $\frac{\text{Sum of observations}}{\text{Total no. of observations}}$

From the given information we can write,

27 = $\frac{\text{Sum of observations}}{\text{120}}$

Sum of observations = $27\times 120$ = 3240