Question

hey guys answer it❤️❤️❤️a class has girls and boys in the ratio 4: 5 among the girls the ratio of mathematics to physics students is 3 : 1 if the ratio of mathematics and physics students in the entire class is 3 :2. what percent of class comprises girls studying mathematics?​

Answer 1

4:5=4/5

to convert fraction into percent 4/5×100

4×20 =80%

Answer 2

$\huge\tt\green{Answer}$

.Let us assume that the total number of student in the class is 90.

According to the given condition, Girl:Boy=4:5

4x+5x=90

9x=90

x=10

So the number of girls is 40 and the number of boys is 50.

Now, according to the second condition ratio of mathematics to physics is 3:1 for girls.

So, 3x+x=40

4x=40

x=10

So, the number of girls studying physics is 10 and mathematics is 30.

So, the number of girls studying physics to the total number of girls is 10/40

So, percentage =(10/40)*100 =25%

@Incrediblegurl01