During a certain month, a firm posted x letters with Rs. 5 stamps on each and another y letters with Rs. 3.50 stamps on each. Obtain an expression to find the total money Rs. M, spent on postage.
A
M= Rs. (5x+3.50y)
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B
M= Rs. (5x−3.50y)
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C
M= Rs. (x+3.50y)
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D
M= Rs. (x−3.50y)
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Solution
The correct option is AM= Rs. (5x+3.50y) Amount for x letters with Rs. 5 stamps = Rs. 5x
Amount for y letters with Rs. 3.5 stamps = Rs. 3.5x