Question

There are some students in a class each student donated as many rupees as the square of numbers of students in the class in flood victims relief fund if total donations is rs 29791 then find the number of students in the class

Answer 1

Step-by-step explanation:

Correct option is

C

240

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.