Question

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Answer 1

Răspuns:

Explicație pas cu pas:

A = {4, 5, 6, 7}

B = {5, 6, 7}

fractii a/b

4/5; 4/6; 4/7; 5/5; 5/6; 5/7; 6/5; 6/6; 6/7; 7/5; 7/6; 7/7 = 12 fractii

a)

fractii supraunitare 6/5; 7/5; 7/6 = 3 fractii

P = 3/12 = 1/4

b)

fractii subunitare

4/5; 4/6; 4/7; 5/6; 5/7; 6/7 = 6 fractii

P = 6/12 = 1/2

c)

fractii echiunitare

5/5; 6/6; 7/7 = 3 fractii

P = 3/12 = 1/4