Question

in a class 80% of the students passed in the annual examination if the number of students failed is 40 what is the total number of students appeared in the examination

plz help easy method​

Answer 1

Answer:

Student Passed in English =80%

Students failed in English=100%−80%=20%

Students passed in Maths =70%

Students failed in Maths =100%−70%=30%

Students failed in both =10%

Total failed students = Failed in English + failed in Math − Common

Total fail students =20%+30%−10%=40%

If 40% failed then 60% will be passed.

Let total students be x.

Hence, 60% of x=144

⇒

100

60

×x=144

⇒x=

60

144×100

⇒x=240

Therefore, total students is 240.