Question

in a hostel sports fest 13 boys played in cricket tournament 40% boys played in hockey tournamanet 15% boys played in both the tournaments and 10% in none how many boys are there in hostel

Answer 1

"Let the number of boys in the hostel be x.

Thus those playing only football are 0.25x, the ones playing both the games are 0.15x, the ones playing only cricket are 13 – 0.15x and the ones playing no game are 0.1x.

Adding all the values and equating it to x, we get

x = 20 students

"