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When there is an increase of 30% in the price of TV sets and decrease of 20% in the number of sets sold, then what is the percentage effect on total sales?

A4% loss

B8% loss

C4% gain

D8% gain

Answer:

C. 4% gain

Read Explanation:

[ x-y - (xy/100)% ] = 30 - 20 - (30 x 20) / 100 % =10-6=4% gain


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