there are 35 girls and 45 boys in a class. find the ratio of:a number of girls to number of boys. b number of girls to total number of students
Answers
Given ,
There are 35 girls and 45 boys in a class .
a] Find the ratio of number of girls to number of boys .
Answer =>
No.of girls in the class= 35
No.of boys in the class = 45
= 35:45
= 7:9 [ cancelled by 5 table ]
Therefore the ratio of girls to boys = 7:9
b] Find the ratio of number of girls to total number of students .
Answer =>
No.of girls + No.of boys = Total no.of students
35+45= 80
Total no.of students = 80
No.of girls in the class= 35
= 35:80
=7:16
Therefore the ratio of number of girls to total number of students = 7:16 .
Solution :
Number of girls in the class = 35
Number of boys in the class = 45
Total number of students = 35 + 45 = 80
a) We need to find the ratio of girls to boys
So, number of girls : number of boys
= 35 : 45
= ( 5 * 7 ) : ( 5 * 9 )
= 7 : 9 ( by cancelling 5 )
b) We need to find the ratio of girls to total number of students
So, number of girls : total number of students
= 35 : 80
= ( 5 * 7 ) : ( 5 * 16 )
= 7 : 16 ( by cancelling 5 )