SOLUTION: If n(A) = 66, n(B) = 15, and n(A ∩ B) = 6, find n(A ∪ B).

Algebra ->  Probability-and-statistics -> SOLUTION: If n(A) = 66, n(B) = 15, and n(A ∩ B) = 6, find n(A ∪ B).       Log On


   

Question 1113480: If
n(A) = 66, n(B) = 15, and n(A ∩ B) = 6, find n(A ∪ B).
Found 2 solutions by rothauserc, ikleyn:
Answer by rothauserc(4718) About Me  (Show Source):
You can put this solution on YOUR website!
66 + 15 - 6 = 75
:
n(AUB) = 75
:

Answer by ikleyn(52776) About Me  (Show Source):
You can put this solution on YOUR website!
.
Regarding this problem,  see the lesson
    - Counting elements in sub-sets of a given finite set
in this site.