Question

a professor gave 42500 rupees to boys and girls in the ratio of 7: 3. boys spend 80% of their money and girls spend 60% of their money. when they went to a party boys paid 80% of the bill and exhausted the money, how much amount left with the girls?

Answer 1

Hey!!!

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Total Money = 42500

Thus girls got

$= > \frac{3}{10} \times 42500$

=> 3 x 4250

=> 12750

Thus they spent 60% of 12750

Thus

$\frac{60}{100} \times 12750$

=> 6 x 1275

=> 7650

Money left = 12750 - 7650

=> 5100

In the party girls only paid 20 % bill.

Case 2

=> For Boys

They got

$\frac{7}{10} \times 42500$

=> 7 x 4250

=> 29750

They spent 80% of it

$\frac{80}{100} \times 29750$

=> 8 x 2975
=> 23800

Money left = 29750 - 23800

=> 5950

let the total bill of the party be x

Then
$\frac{80}{100} \times x = 5950$

=> x = 7437.5

Thus remaining => 7437.5 - 5950

=> 1487.5 (Answer)

Thus the girls are left with Rs.1487.5

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Hope this helps ✌️

Legally Good Morning:-)