The average of 4 numbers was calculated using 6 numbers, resulting in 72. What is the correct average?

Here are the solutions to the questions:

Question 16:

Step 1: Determine the sum of the 4 numbers based on the incorrect calculation.
Let $S$ be the sum of the 4 numbers. The incorrect average was 72, obtained by dividing by 6 instead of 4.

$$\frac{S}{6} = 72$$

Step 2: Calculate the actual sum $S$.

$$S = 72 \times 6$$ $$S = 432$$

Step 3: Calculate the correct average by dividing the sum by the correct number of items (4).

$$\text{Correct Average} = \frac{S}{4}$$ $$$$