Question

If average of 3 quantities is 15 , sum of quantities is....?

Answer 1

45

Explanation:

Let the three quantities be x, y and z.

`\because \: average = (sum \: of \: quantities)/(no \: of \: quantities) \\ \\ \therefore \: 15 = (x + y + z)/(3) \\ \\ 15 * 3 = x + y + z \\ \\ \huge \purple{ 45 = x + y + z}`