Question

One-third of the persons in front of me together with 3/4th of the persons behind me equal the total number of the persons in the merry go round. Find the total number.
​
In a survey of 100 students, it was found that 50 used the college library, 40 had their own library and 30 borrowed books. Of these 20 used both the college library and their own, 15 used their own library and borrowed books and 10 used the college library and borrowed books. How many students used all the three sources of books?
1] 25 2] 22 3] 28 4] 20

Answer 1

I PROMISE I WILL FOLLOW YOU IF YOU MARK AS BRAINLIST

THANKS FOR QUESTION

YOUR ANSWER IS

1/3(x-1)+3/4(x-1)=x

total no.of person=x

by solving the eq we get x=13