A paper file costs Rs0.80 and a plastic file Rs1.50. Suman bought $x$ paper files and $y$ plastic files. How many rupees should she pay the shopkeeper?

$8 y + 15 x$

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$0.8 x + 1.5 y$

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$8 x + 15 y$

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$80 x + 1500 y$

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Solution

The correct option is B
$0.8 x + 1.5 y$

Give, the number of paper files bought is $x$
and the number of plastic files bought is $y$

Cost of one paper file and one plastic file is Rs0.80 and Rs1.50.

Hence, the total amount to be paid is $R s 0.8 x + 1.5 y$

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