probability maths?

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if Pr(A) = 0.34, Pr(B) = 0.57 and Pr(A u B) = 0.89, calculate Pr(A n B)

2007-05-30 20:48:36 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics

Pr(A u B)=Pr(A)+Pr(B)-Pr(A n B)
==>Pr(A n B)=Pr(A)+Pr(B)-Pr(A u B)

==>Pr(A n B)=0.34+0.57-0.89=0.91-0.89=0.02

Answer=0.02

2007-05-30 21:10:11 · answer #1 · answered by cinu 4 · 0⤊ 0⤋

2007-05-31 04:00:12 · answer #2 · answered by Helmut 7 · 0⤊ 0⤋