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there is: B = {a,b,c,d,e,…,x,y,z}

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there is: B = {a,b,c,d,e,…,x,y,z}

 

to calculate:

 

 

|{X|X⊆B und |X|≤3}|

 

can anybody help me?

 
 Nov 5, 2017

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