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Răspuns :

Răspuns:

A) A={ 1, 2 ,3 ,4} ,,, card A= 4

B) B={ 3, 4 ,5, 6} ,,, card B= 4

C) C={ 3, 6, 9} ,,, card C=3

D) D={ 6, 8, 10, 12} ,,, card D= 4