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jeka57 [31]
3 years ago
11

Help me answer this, thank you

Mathematics
1 answer:
anastassius [24]3 years ago
4 0

Answer:

4

Step-by-step explanation:

P={1,2,3,4,5,6}

Q={3,4,5,6,7,8,9}

PnQ={3,4,5,6}

Therefore, n(PnQ) =4

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