Si n(AUB) = 30, n(A) = 22; n(B) = 15, calcula n(A AB). O 7 O 15 O O 23 O 8 O 18
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Verified answer
Respuesta:
La respuesta el la O 7.
Explicación paso a paso:
A=30-15
A=15
B=30-22
B=8
A+B+X=30
15+8+x=30
23+x=30
x=30-23
x=7