Question

2). Solve it for x. }
13. In a Class of 65 students, the number of boys is three-fifths of the number of girls. Find the number of boys
in the class.
14. Bansi has 3 times as many two-rupee coins as he has five-rupee coins. If he has in all a sum of 377, how
many coins of each denomination does he have?
[NCERT]
{Hint: Let Bansi has x number of five-rupee coins. Then number of two-rupee coins he has is 3x.
According to the question, 2(3x) + 5(x) = 77. Solve it for x.}
15. Deveshi has a total of 590 as currency notes in the denominations of 50, 720 and 10. The ratio of the
number of 50 notes and 20 notes is 3:5. If she has a total of 25 notes, how many notes of each denomination
does she have?
[NCERT]
{Hint: Let the number of 50 notes, 20 notes and 10 notes be 3x, 5x and (25 – 8x) respectively.
Then, 50(3x) + 20(5x) + 10(25 - 8x) = 590. Solve it for x.)​

Answer 1

. In a Class of 65 students, the number of boys is three-fifths of the number of girls. Find the number of boys

Step-by-step explanation:

let the no. of boys be x.

no. of boys= x

the number of girls =3/5 of the total boys (given)

so we will first find no. of girls.

therefore no. of girls = 3/5×65

= 39 girls.

Now the total no. of boys = total students - total no of girls

therefore total no. of boys = 65 - 39

= 26

so the number of boys = 26

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