Question

Se n(A U B) = 14, n(A) = 10, n(B) = 9, determine n(A ∩ B).

( )5
( )9
( )10
( )14
( )19

urgenteee

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Answer 1

Explicação passo-a-passo:

n(A U B) = n(A) + n(B) - n(A ∩ B)

14 = 10 + 9 - n(A ∩ B)

14 = 19 - n(A ∩ B)

n(A ∩ B) = 19 - 14

n(A ∩ B) = 5