what does n means if its written n(S n T n Y).
n=intersection inside the brackets.
if its written outside the brackets what does it mean?

Question

amistre64 · Answer

cardinality, the number of elements of the set

amistre64 · Answer

say A={a1,a2,a3,a4}

then the cardinality of A, or n(A) = 4, since it contains 4 elements

amistre64 · Answer

and those 'n' inside the brackets arent n's, they are cappas i believe

amistre64 · Answer

$$\cap$$

anonymous · Answer

but that is for numbers 
im talking about venn diagram

amistre64 · Answer

that is for sets

amistre64 · Answer

venn diagrams are a way to present sets ...

amistre64 · Answer

n(SnTnY) is notation for the number of elements that all 3 sets have in common

anonymous · Answer

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amistre64 · Answer

locate SnTnY for me

anonymous · Answer

|dw:1405969946347:dw|