eighteen students in a class play baseball. Seventeen students play basketball. Thirty students play either or both sports. Venn diagram problem plz help!

Question

anonymous · Answer

ok, did you draw a venn diagram?

anonymous · Answer

|dw:1395339566671:dw|

anonymous · Answer

what's that either or both?

anonymous · Answer

thats the 30 students

anonymous · Answer

at end of question

anonymous · Answer

would you like some examples? i have a few.

anonymous · Answer

"will give medal to most accurate answer" <- never say this. people don't care about metal

anonymous · Answer

so is the formula for the union?

anonymous · Answer

*what is*..

anonymous · Answer

im not exactly sure... i just started this kind of problem 5 minutes ago.

anonymous · Answer

here's some options if it helps

anonymous · Answer

n(A or B) = n(A) + n(B) - n(A and B)

anonymous · Answer

attachment

anonymous · Answer

first one

anonymous · Answer

it is? ok... so how did you get it? i really want to know.

anonymous · Answer

use that formula above i gave you
30 = 18 + 17 - n(A and B)
n(A and B) = 5

so 5 students play both base ball and basketball.

anonymous · Answer

ohhhhhh.... ok hopefully thatl'l stick....

anonymous · Answer

so that means 18 - 5 = 13 students play only baseball 
and 17 - 5 = 12 students play only basketball

anonymous · Answer

would the formula change if it looked like this?|dw:1395340303480:dw| somewhat? XD

anonymous · Answer

in other words, if it had 3 links.

anonymous · Answer

yes the formula will change

anonymous · Answer

ok.