Question

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Answer 1

Answer:

If x and y are the cost of one shirt and one blouse respectively and if the cost of a pair of trousers is 5 more than the shirt and that of a skirt is 3 more than the blouse, and if there are 25 about out of 40 pupils, then total amount paid by them in terms of x and y is 20(5x+3y+17)

Step-by-step explanation:

Given

Cost of one shirt = Rs x

Cost of a pair of trousers = Rs ( x+5 )

So, the cost of the shirt and trousers together = x+x+5 = 2x+5

Number of boys in the class = 25

Cost of 2 sets of uniforms bought by 25 boys

$= 25*2(2x+5) \\\\= 50(2x+5)\\\\= Rs 100x + 250$

So total amount paid by boys = Rs 100x +250

Cost of one blouse = Rs y

Cost of one skirt = Rs (y+3)

Cost of one blouse and skirt together = y+y+3 = 2y+3

Number of girls in the class = 40-25 = 15

Cost of 2 sets of uniforms bought by 15 girls

$= 15*2(2y+3)\\\\= 30(2y+3)\\\\= Rs 60y + 90$

So total amount paid by girls = Rs 60y+ 90

The total amount paid by boys and girls =

$100x + 250 +60y +90\\\\= 100x + 60y +340$

So the total amount paid is Rs 100x +60y + 340

That is, Rs 20(5x+3y+17)