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question #23
23. Ali buys a glass, a pencil box and a cup and pays rs 21 to the shopkeeper. Rakesh buys a cup, two pencil boxes and a glass and pays rs 28 to the shopkeeper. Preeti buys two glasses, a cup and two pencil boxes and pays rs 35 to the shopkeeper. The cost of 10 cups will be

D
Let the price of single glass is G and of Cup is C , same for Pencilbox P.
G + P + C = 21 ----------1
G + 2P + C = 28 ----------2
2G + 2P + C = 35 ---------3

Subtract 2 from 3 we get G =7. Subtract 1 from 2 we get P =7. . Hence C = 7. Cost of 10 cup is 70.
.
Let the price of single glass is G and of Cup is C , same for Pencilbox P.
G + P + C = 21 ----------1
G + 2P + C = 28 ----------2
2G + 2P + C = 35 ---------3

Subtract 2 from 3 we get G =7. Subtract 1 from 2 we get P =7. . Hence C = 7. Cost of 10 cup is 70.

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NET JANUARY 2017 PAPER1