Hi

In order to solve this problem we need to know the mean & the terms of the sample.

Statement A :

Gives us 39 consecutive even elements

Eg : 0,2,4,.....

To Compute SD1. Compute the difference of each data point from the mean, and square the result of each

2. compute the average of these values, and take the square root

Which we can calculate easily from the given data

Thus statement A is sufficient

Statement B

Mean is 382 only gives us the mid point of the set but not the number of elements hence we cannot calculate the SD

Thus statement B is insufficient

Hope this helps

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