Question 1143525: If P(A)=3/8 and P(B)=1/4,find:
4.1.1 P(A or B) if A and B are mutually exclusive events.
4.1.2 P(A or B) if A and B are independent events.
4.2 A car park has 14 VOLKSWAGEN cars and 18 BMW's.There are no cars.
During the afternoon two cars are stolen -one early afternoon,the other later.
Determine the probability that:
4.2.1 Both cars were BMW's.
4.2.2 The first one stolen was a BMW and the second one was a Volkswagen.
4.3 Eight boys and seven girls are to be seated randomly in a row.What is the probability that:
4.3.1 The row has a girl at each end?
4.3.2 The row has girls and boys sitting in alternate?
Please help me.
Answer by ikleyn(52803)   (Show Source):
You can put this solution on YOUR website! .
4.1
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If A and B are mutually exclusive events, then
P(A or B) = P(A) + P(B).
If A and B are independent events, then
P(A or B) = P(A) + P(B) - P(A)*P(B).
4.2
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The formulation is DEFECTIVE.
Check it with your source; then fix and re-edit; then re-post to the forum.
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ONE and ONLY ONE problem per post.
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Instead of packing many problems in one post inaccurately, you better submit one problem per post accurately (!)
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