Probability Watch

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Twiglet
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#1
Report Thread starter 14 years ago
#1
Hi - quick question
events A and B are independent
events A and C are mutually exclusive
P(A) = 1/3
P(C) = 1/5
P(A union B) = 2/3

find P(B) - how ??!?!?!
I think i'm missing something biiiig!
thanks for any help
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Jonny W
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#2
Report 14 years ago
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P(A union B)
= P(A) + P(B) - P(A intersect B)
= P(A) + P(B) - P(A)P(B) . . . . . because A and B are independent

Solve for P(B).
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