Question

Information on sales in a shop on various days is given. When sales on a festival day is included with the other sales, mean sales will

• A. decrease
• B. increase
• C. remain the same

Answer 1

The correct option is B increase

The given data is

1200, 1400, 1500, 1600

Sales without including festival sales:

1200, 1400, 1500

Mean = $\frac{1200+1400+1500}{3}$

= 1366.67

Mean including festival sales:

= $\frac{1200+1400+1500+1600}{3}$

= 1425

Hence, the mean of sales increases.