Store orders three parakeets
A pet supplier has stock of parakeets of which 10% are blue parakeets. A pet store orders three parakeets from this supplier. If the supplier chooses the parakeets at random, determine the chance that pet store gets exactly one blue parakeet?
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There're 400 students in Tsing Hua University undergraduate level, which 95 of them had learned or are learning to play guitar. Let p be the proportion of Tsing Hua University students who had learned or are learning to play guitar.
A pet store orders three parakeets from this supplier. If the supplier chooses the parakeets at random, determine the chance that pet store gets exactly one blue parakeet?
A multiple choice quiz include 10 questions, each with four possible answers. Determine the mean for the number of correct answers, if a student guesses on each question.
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If each hunter independently hits his target with probability .6, calculate the expected number of ducks that are hit. Suppose that the number of ducks in flock is Poisson random variable with mean 6.
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