In discrete math where denotes the cardinality of set A?

[Exile]

where denotes the cardinality of set A?
Question Details: Let A = {a, b, c, d, e}, B = {a, b, e, g, h} and C = {b, d, e, g, h, k, m, n}.

Verify that these finite sets satisfy the following (Key: u = Union, n = intersection):

|AuBuC|=|A|+|B|+|C|-|AnB|-|BnC|-|AnC|+|AnBnC|

where denotes the cardinality of the set A etc.

I am not sure if I understand this question, so I will be awaiting your results to compare with mine!

Thanks in advance,
Exile!

 

[stapel]

where denotes the cardinality of set A?

I'm sorry, but I don't understand the above...? It sounds as though a word or symbol is missing between the "where" and the "denotes"...?

Please reply with clarification. Thank you!

Eliz.

 

[cadamcross]

There's nothing to this but counting and knowing what union and intersection mean. |A| denotes "cardinality of A" which means the number of elements in A. I may be able to help further if you clarify what about the question you don't understand.

Adam