In a school ,there are 500 students .Out of these 275 are boys and the rest are girls .Find rato of : (a) the boys to the total number of students .(b) the girls to that of the boys.(c) the girls to the total number of students ​

boys and the students is 275:500

the girl that of the boys: 225:275

the girls total number of students 225:500

a) 11 : 20

b) 9 : 11

c) 9 : 20

Explanation:

500: total number of students

275: total number of boys

500 - 275 = 225: total number of girls

then:

a) the boys to the total number of students:

275:500 = 11:20

b) the girls to that of the boys.

225:275 = 9:11

c) the girls to the total number of students ​

225: 500 = 9:20