Question

In an examination 50% of the students passed in mathematics and 70% of students passed in science while 10% of students failed in both subjects. 300 students passed in both the subjects. Find the total number of students who appeared in the examination, if they took examination in only two subjectsin an examination 50% of the students passed in mathematics and 70% of students passed in science while 10% of students failed in both subjects. 300 students passed in both the subjects. Find the total number of students who appeared in the examination, if they took examination in only two subjects

Answer 1

Step-by-step explanation:

Total pass=300

Students Pass in Maths=50%

Students pass in science=70%

Students fail in both=10%

So, students pass in both=90%

(50%+70%)-90%

=120% - 90%

=30%(total students pass)

Let,total students=A

So, A×30%=300

A×30/100 =300

A=300×100/30

A=1000

Therefore,total students=1000