Question

PLEASE ANSWER

There is 100 guests in total. 90 have French heritage, 80 have English heritage, and 75 have Native American heritage. At least how many have heritage from all three cultures?
A: 40
B: 45
C: 22
D: 18

Answer 1

Using the venn diagram, the intersection or guests of all cultures can be represented by a variable, x.
90-4x+80-4x+75-4x+4x=100
245-8x=100
245-245-8x=100-245
-8x=-145
-8x/-2=-145/-8
x=18.125
I am not sure about this equation but I think the answer is 18