Question 21.
Rohan's mother gave him 3xy and his father gave him 5(xy + 2). Out of this total money
he spent (10 - 3xy.) on his birthday party. How much money is left with him? [NCERT
Exemplar]
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Answer:
Step-by-step explanation:
It is given that rohan's mother gave him Rs 3xy² and his father gave him Rs 5 (xy²+2) out of his money.
Total earning = 3xy^2+5(xy^2+2)
= 3xy^2+5xy^2+10
= 8xy^2+10
He spent Rs(10-3xy²) on his birthday party.
Total Expenses = 10-3x²
We need to find the remaining amount.
Remaining amount = Total earning - Total Expenses
= 8xy^2+10-(10-3x^2)
= 8xy^2+10-10+3x^2
= 11xy^2
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