SOLUTION: Let A={2, 4, 6, 8} and B={2, 3, 5, 7, 9}. Compute n(A). ​ 17 14 5 8 4 1 Please explain. Thank you

Algebra ->  Expressions -> SOLUTION: Let A={2, 4, 6, 8} and B={2, 3, 5, 7, 9}. Compute n(A). ​ 17 14 5 8 4 1 Please explain. Thank you      Log On


   

Question 1054912: Let A={2, 4, 6, 8} and B={2, 3, 5, 7, 9}. Compute n(A).
​
17
14
5
8
4
1

Please explain. Thank you
Answer by rothauserc(4718) About Me  (Show Source):
You can put this solution on YOUR website!
n(A) is the number of elements in set A
:
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There are 4 elements in set A
:
note the following
:
n(A union B) = n(A) + n(B) - n(A intersect B)
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: