The table below shows the sales of three items over three months:

| Item | Jan | Feb | Mar |
|-------|-----|-----|-----|
| X | 150 | 180 | 170 |
| Y | 120 | 110 | 130 |
| Z | 200 | 210 | 190 |

**Question:** Which item had the highest average sales over the three months?

Question

The table below shows the sales of three items over three months:

| Item | Jan | Feb | Mar |
|-------|-----|-----|-----|
| X     | 150 | 180 | 170 |
| Y     | 120 | 110 | 130 |
| Z     | 200 | 210 | 190 |

**Question:** Which item had the highest average sales over the three months?

Accepted Answer

Solution:
Sales of item X:
$$ 150,\ 180,\ 170 $$
Average sales of X:
$$ \frac{150 + 180 + 170}{3} = \frac{500}{3} = 166.67 $$
Sales of item Y:
$$ 120,\ 110,\ 130 $$
Average sales of Y:
$$ \frac{120 + 110 + 130}{3} = \frac{360}{3} = 120 $$
Sales of item Z:
$$ 200,\ 210,\ 190 $$
Average sales of Z:
$$ \frac{200 + 210 + 190}{3} = \frac{600}{3} = 200 $$
Now compare the averages:
$$ X = 166.67,\quad Y = 120,\quad Z = 200 $$
Item Z has the highest average sales.
Final Answer: **(c) Z**

Answer

Answer

Answer