Question

At summer camp, 20 campers try horseback riding or climbing. If 13 campers try horseback and 15 campers try climbing, how many campers try both activities?

Answer 1

@johnweldon1993
@kelliegirl33 @Jonathan1997 @RadEn @petiteme @agent0smith anybody ?

Answer 2

u should use venn diagram

Answer 3

I was gonna say that

Answer 4

20 = 15-x + 13-x + x
solve for x

Answer 5

alternative :
n(A⋃B) = n(A) + n(B) - n(a⋂b)
20 = 13 + 15 - n(a⋂b)

solve for n(a⋂b) ?

Answer 6

woukld it be 6 ?

Answer 7

or 8?

Answer 8

Which one? Are you sure?

Answer 9

no im not sure