Question

25 percent of students like mathematics 50 percent of the remaining students like English and 50 percent of the remaining students like hindi no of students like computer is9, how many students are​

Answer 1

Answer:

30 students like maths.

25 students like science.

So 30 + 25 is the number of students who only like maths or science and students who both like math and science.

But 30 contains the numer of students who both like maths and sciene, and 25 do the same thing.We compute the number of both twice

So 30+25–16*2=23 is the number of students who only like maths and science.

And you can compute it another way: 30 contains students who like science ,you can minus 16 is the number of students who only like maths , the same way, 25 minus 16 is the number of students who only like sciwnce, and we plus them to get the result:(30–16)+(25–16)=23.