Question

The ratio of boys to girls in a class is 3:5. There are 40 students in the class. How many more girls than boys are there?

Answer 1

Step-by-step explanation:

Since the ratio is 3 to 5

3out of 8 boys

5 out of 8 girls

40* 3/8 = 15 boys

40*5/8 = 25 girls

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Answer 2

Given:

The ratio of boys to girls in a class is 3:5 and there are 40 students in the class.

To find:

The number of girls that are more than boys.

Solution:

As given,

The total number of students in a class = 40

The ratio of boys to girls in a class = 3:5

Let x be the highest common factor between the total number of boys and girls.

So, we have,

Number of boys in the class = 3x

Number of girls in the class = 5x

$3x + 5x = 40$

$8x = 40$

$x = 5$

Hence, after putting the value of x, we have,

The number of boys in the class

$= 3x$

$= 3(5)$

$= 15$

Similarly,

Number of girls in the class

$= 5x$

$= 5(5)$

$= 25$

So, the number of girls that are more than boys = total number of girls - total number of boys

$= 25 - 15$

$= 10$

Hence, the number of girls that are more than boys is 10.