Question

In an examination 80 candidates passed in english and 75% passed in mathamatics while 15% students failed in both if 350 students passed. find the total number of students who appeared in the examination

Answer 1

If 80% student passed in sub. English and 85% passed in mathe. If 75% passed in both sub and 45 failed in both, what is the total number of students?

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6 ANSWERS



Pranav Yadav, b.tech Computer Science Engineering & Business Strategy, Lovely Professional University- LPU (2020)

Answered Jan 30, 2017

let total no. of student be x.

then,student passed in english=80% of x=80/100*x=4x/5.

student passed in mathematics=85%0f x=17x/20

student passed in both subjeect=75%ofx=3x/4

total no.of student passed in either subject =4x/5+17x/20–3x/4=9x/10

total no of student failed in both subject=total no. of student-total no.of student passed in either subject.

this implies, x-9x/10 =45 (since it is given total no. of student failed=45)

solving this we get x=450.