EM-1240

Number of elements, n(A)

E Math · Secondary 3 · Medium · Number of elements, n(A)

For two sets

A

and

B

,

n(A \cup B) = 40

,

n(A) = 25

and

n(B) = 23

. Find

n(A \cap B)

.

8
15
17
48

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