Question

Inaclassof80students,1/5ofthetotalnumberofstudentsliketostudyEnglish,

2/5ofthetotalnumberliketostudyMathematicsandtheremainingstudentslike

tostudyScience.

i)HowmanystudentsliketostudyEnglish?

ii)HowmanyofstudentsliketostudyMathematics?

iii)WhatfractionofthetotalnumberofstudentsliketostudyScience?​

Answer 1

1. 1/5 of 80 = 1/5×80 = 16 students like to study English
2. 2/5 of 80 = 2/5×80 = 32 students like to study Mathematics
3. Always sum of fraction equal to one

So,

Let x fraction of the total number of students like to study science

1/5+2/5+x = 1

3/5+x = 1

x = 1-3/5

x= 5-3/5

x=2/5

Therefore, fraction of the total number of student like to study science is 2/5

Hope it helped you dear friend