After testing asphalt shingles are classified as high


Question: After testing, asphalt shingles are classified as high, medium, or low grade, and different grade shingles are sold under different warranties.

(a) In how many ways can the next 15 shingles be classified into high, medium, or low grade? (Hint. Think of a task consisting of 15 stages, with each stage having 3 outcomes.

(b) How many classifications have three, five, and seven shingles in the high, medium, and low grade categories, respectively?

(c) If the classifications are all equally likely, what is the probability of the event in part (b)?

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Basic Statistics: After testing asphalt shingles are classified as high
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