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3. Box A contains 6 red balls and 3 green balls, whereas box B contains 3...

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Statistics

3. Box A contains 6 red balls and 3 green balls, whereas box Bcontains 3 red ball and 15 green balls.

Stage one:One box is selected at random in sucha way that box A is selected with probability 1/5 and box B isselected with probability 4/5.

Stage two: First, suppose that 1 ball isselected at random from the box selected at stage one.

a) What is the probability that the ball is red?

b) Given that the ball is red, what is the probability it camefrom box A? Next, suppose that two balls are selected at randomwithout replacement from the box selected at stage one.

c) What is the probability that both balls are red?

d) Given that both balls are red, what is the probability theycame from box A?

e) What is the probability that one ball is red and the other isgreen?

f) Given that one ball is red and the other is green, what isthe probability they came from box A?

Answer & Explanation Solved by verified expert
4.2 Ratings (576 Votes)
3Box A Number of red balls 6Number of green balls 3Box B Number of red balls 3Number of green balls 15A Event of selecting Box AB Event of selecting Box BPA 15 PB 45aR Event of selecting red BallG Event of selecting Green ballPRA Probability of selecting Red Ball given that Box A isselected Number of red balls in Box A Total number of balls inBox A 69PRB Probability of selecting Red Ball given that Box B isselected Number of red balls in Box B Total number of balls inBox B 318suppose that 1 ball is selected at random from the box    See Answer
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