Math, asked by oswaldjustin006, 23 hours ago

21 students
girls : boys = 3:4
how many boys and girls?

Answers

Answered by bikaskmc

1

Answer:

boys = 12. girls = 9 are there

Answered by llMagicLilyll

7

Answer:

Let number of boys be x and number of

girls be y,

Then it is given that Given, x + y = 21

Also given X y 4 3 =

4y

3

Substituting 2nd equation in 1st, we get,

4y

3 +y=21

⇒ 7y=63

⇒y=9

Therefore, x = 21-9 = 12

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