Please help me with combinatorics:(adsbygoogle = window.adsbygoogle || []).push({});

I have three sets:

A with elements (a1 ……..ai )

B with elements (b1 ……..bk )

C with elements (c1 ……..cj )

Pls help me to work out how many sets ABC shall I have that contain each element from sets A, B and C

Thanks much

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# Combinatorics question

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