9. If n(A) = 20, n(B) = 16 and n(A U B) = 30, find n(
AB).
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Answered by
0
Step-by-step explanation:
n(A U B)= n(A)+n(B)- n(AnB)
30 = 20 +16 - x
30= 36-x
x=36-30=6
n(AnB) =6
Answered by
1
Answer:
6
Step-by-step explanation:
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