Question

Question 84

Rohan's mother gave him Rs. $3x{y}^2$ and his father gave him Rs. $5(x{y}^2+2)$.Out of this money, he spent Rs. $(10-3x{y}^2)$ on his birthday party. How much money is left with him?

Answer 1

Given, amount given to Rohan by his mother $=Rs.3x{y}^2$
and amount given to Rohan by his father = Rs. $5(x{y}^2+2)$
$\therefore$ Total amount Rohan have $=\left[\right(3x{y}^2)+(5x{y}^2+10\left)\right]=Rs.[3x{y}^2+5x{y}^2+10]$
= Rs. $(8x{y}^2+10)$
Total amount spent by Rohan = Rs. $(10-3x{y}^2)$
$\therefore$ After spending, money left with Rohan
$=Rs.\left[\right(8x{y}^2+10)-(10-3x{y}^2\left)\right]=8x{y}^2+10-10+3x{y}^2=8x{y}^2+3x{y}^2+10-10=Rs.11x{y}^2$