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PLEASE HELP ME PLEASE 10 POINTS ON IT PLEASE​

PLEASE HELP ME PLEASE 10 POINTS ON IT PLEASE​-example-1
User ULan
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1 Answer

3 votes

Answer:

6. He had Rs728.

7. There are 1875 pupils in the school.

Explanation:

6.

He started with x amount of money.

He spent 1/4 of x. x - (1/4)x = (4/4)x - (1/4)x = (3/4)x

After buying the lottery tickets, he had (3/4)x left.

Then he spent 2/7 of the remainder on scratch cards.

He spent 2/7 of (3/4)x on scratch cards. Since he spent

2/7 of the reminder on scratch cards, he has 5/7 of the reminder left.

5/7 * (3/4)x = (15/28)x

He has (15/28)x left. He has Rs390 left.

(15/28)x = 390

15x = 390 * 28

15x = 10920

x = 728

Answer: He had Rs728.

7.

8/15 of the pupils are girls.

1 - 8/15 = 15/15 - 8/15 = 7/15

7/15 of the pupils are boys.

Let x = total number of pupils in the school

(8/15)x = (7/15)x + 125

Multiply both sides by 15.

8x = 7x + 1875

x = 1875

Answer: There are 1875 pupils in the school.

User Ary Jazz
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8.6k points

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