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Question

Rohan’s mother gave him 3xy2 and his father gave him 5(xy2+2). Out of this total money he spent (103xy2) on his birthday party. How much money is left with him?


A
31 xy2
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B
21 xy2
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C
11 xy2
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D
13 xy2
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Solution

The correct option is C 11 xy2
Money give by Rohan’s mother =3xy2
Money given by his father =5(xy2+2)
Total money given to him =3xy2+5(xy2+2)
=(3xy2+5xy2+10)
=(8xy2+10).
Money spent by him =(103xy2)
Money left with him =(8xy2+10)(103xy2)
=(8xy2+1010+3xy2)
=(11xy2)
Hence, the required money =11xy2

Mathematics

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