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Question

# What is the difference between the average number of sports watches sold by stores B, C, G and H together and the average number of luxury watches sold by the same together?

A
1100
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B
12000
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C
900
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D
800
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E
1300
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Solution

## The correct option is A 1100Average number of sports watches sold by stores B, C, G and H =41×3204=131204=3280 Average number of luxury watches sold by stores B, C, G and H (11×560−16×320)+(14×560)−7×320)+(5×560−6×320)=+(9×560−12×320)4(6160−5120)+(7840−2240)=+(2800−1920)+(5040−3840)4=1040+5600+880+12004=87404=2180 ∴ Required difference =3280−2180=1100

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