The average of 70 values is 40. If each value is multiplied by 20, what will be the changed average?

Correct option is A

Given:

Average of 70 values is = 40.

Each value is multiplied by 20

Solution:

The changed average will be-

Sum of 70 values = 40 $$\times$$ 20 = 800

So, the new average is 800.

Thus, correct option is (a)