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14 March, 01:03

A hospital gift shop sells magazines, books and cards in the ratio 4:3:9. Suppose the shop sold 45 books, how many magazines and how many cards did they sell.

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  1. 14 March, 02:30
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    Books is the 3 in the ratio, so for every 3 books sold there are 4 magazines and 9 cards.

    Divide the number of books by 3:

    45/3 = 15

    Multiply the ratio of magazines and cards by 15:

    Magazines = 15 x 4 = 60

    Cards = 15 x 9 = 135
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