Question

If the average of 5 numbers is 18, what is their total sum?

• A. 72
• B. 85
• C. 90
• D. 95

Hint:

Average × Number of observations = Total sum.

Answer 1

The Correct Option is C

Step 1: Formula for average: \[ \text{Average} = \frac{\text{Sum}}{\text{Number of terms}} \] Step 2: Substitute given values: \[ 18 = \frac{\text{Sum}}{5} \] Step 3: Calculate sum: \[ \text{Sum} = 18 \times 5 = 90 \]