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The number of coins that Josh spots when walking to work is a Poisson random variable...

The number of coins that Josh spots when walking to work is a Poisson random variable with mean 6. Each coin is equally likely to be a penny (1), a nickel (5), a dime (10), or a quarter

(25). Josh ignores the pennies but picks up the other coins.  Find the probability that Josh picks up exactly 25 cents on his way to work.

Math   Statistics-And-Probability   
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