maths question?

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if Pr(A) = 0.41, Pr(A n B) = 0.27 and PR(A U B) = 0.73, calculate Pr(B)

2007-05-30 19:06:31 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics

PR(A U B)=Pr(A)+Pr(B)-Pr(A n B)
0.73=0.41+Pr(B)-0.27
Pr(B)=0.73-0.41+0.27
=0.59#

2007-05-30 19:32:56 · answer #1 · answered by jackleynpoll 3 · 0⤊ 0⤋

Pr(A) + Pr(B) = .73
Pr(A) - Pr(B) = .27
2Pr(B) = .46
PR(B) = .23

2007-05-31 02:16:40 · answer #2 · answered by ironduke8159 7 · 0⤊ 1⤋

sorry it might take a few minutes.

2007-05-31 02:10:46 · answer #3 · answered by Anonymous · 0⤊ 0⤋