The ratio of number of boys to number of girls in a class is 7:5. If the total number of students are 60 , what will be the number of boys in the class?
Given the ratio of number of boys to number girls of is 7:5.
Let the number boys and girls be 7 ×x and 5 ×x respectively.
Total number of students = 60
7 ×x + 5 ×x = 60
12 ×x = 60
x = 5
Number of boys = 7 ×x
= 7 × 5
= 35