there are 40 pupils in a class. each girl is given 5 books and each boy is given 4 books.the girls have 65 more books than the boys. how many more girls than boys are there in the class?

b+g = 40 ----> g = 40-b

books of boys = 4b
books of girls = 5g

5g - 4b = 65
5(40-b) - 4b = 65
200 - 5b - 4b = 65
-9b = -135
b = 15

there are 15 boys and 25 girls
you finish the question.

To find the number of girls and boys in the class, we can set up a system of equations.

Let's assume the number of girls in the class is G and the number of boys is B.

According to the given information:
1. Each girl is given 5 books, so the total number of books given to girls is 5G.
2. Each boy is given 4 books, so the total number of books given to boys is 4B.
3. The girls have 65 more books than the boys, so we have the equation: 5G = 4B + 65.

Since there are 40 pupils in total, we also know that G + B = 40.

To solve this system of equations, we can substitute the value of G from the second equation into the first equation:

5(40 - B) = 4B + 65
200 - 5B = 4B + 65
200 - 65 = 4B + 5B
135 = 9B
B = 135 / 9
B = 15

Now, substitute the value of B into the second equation to find G:

G + 15 = 40
G = 40 - 15
G = 25

So there are 25 girls and 15 boys in the class.

To find how many more girls than boys there are in the class, subtract the number of boys from the number of girls:

More girls than boys = G - B = 25 - 15 = 10

Therefore, there are 10 more girls than boys in the class.