Question

What is the average number of horror novels sold by stores B, C, E and F together?

• A. 2960
• B. 3060
• C. 2680
• D. 3240
• E. 3180

Answer 1

The correct option is B 3060

Total number of horror novels sold by B, C, F and F together
$=(\frac{63000\times 18}{100}-\frac{36000\times 20}{100})+(\frac{63000\times 20}{100}-\frac{36000\times 24}{100})+(\frac{63000\times 10}{100}-\frac{36000\times 8}{100})+(\frac{63000\times 8}{100}-\frac{36000\times 12}{100})=(630\times 18-360\times 20)+(630\times 20-360\times 24)+(630\times 10-360\times 8)+(630\times 8-360\times 12)=(11340-7200)+(12600-8640)+(6300-2880)+(5040-4320)=4140+3960+3420+720=12240\therefore Requiredaverage=\frac{12240}{4}=3060$