Question

I need a reason why this question is solved this way!!

Answer 1

. After polling a class of 24 students by a show of hands,
you find that 9 students play soccer and 21 students play
basketball. Given that information, what is the number
of students in the class who must play both soccer and
basketball?

Answer 2

The answer is 30-24=6

Answer 3

@Loser66

Answer 4

what is 21+9=?

Answer 5

yes sp 6 would be correct

Answer 6

Because 21 + 9 is 30, but there are 24 people

Answer 7

But why add 21+9?

Answer 8

there are 24 students and 9 play soccer and 21 play basketball
so 30-24=6

Answer 9

so you have to subtract 30 from 24 which is 6

Answer 10

Yes that's an obvious answer but why is it not 9?

Answer 11

why would it be nine?

Answer 12

If 9 play soccer and 21 play basketball why can't the minimum amount of people who play both be 9?

Answer 13

What is the reasoning, instead of saying just subtract/add??

Answer 14

The reasoning is that how do they have 30 results but only have 24 people in the class. That means that some people voted twice so the only way to find out who voted twice is to subtract

Answer 15

@elitedamosh People can't explain this simple question... Thanks btw

Answer 16

No problem :)