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Question

Question 84

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


Solution

Given, amount given to Rohan by his mother =Rs.3xy2
and amount given to Rohan by his father = Rs. 5(xy2+2)
Total amount Rohan have =[(3xy2)+(5xy2+10)]=Rs.[3xy2+5xy2+10]
= Rs. (8xy2+10)
Total amount spent by Rohan = Rs. (103xy2)
After spending, money left with Rohan
=Rs.[(8xy2+10)(103xy2)]=8xy2+1010+3xy2=8xy2+3xy2+1010=Rs.11xy2


Mathematics
NCERT Exemplar
Standard VII

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