​mgf1106 math homework

Question

Find the value of​ n(A ∪ ​B) if ​n(A)=5​, ​n(B)=10 and​ n(A ∩ ​B)=2.

Answer 1

5+10-2= 13

add them then subtract the intersection to get the union

try drawing a venn diagram. kamala harris recommends them