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suppose certain coins have weights that are normally distributed with a mean of 5.191g and a...

suppose certain coins have weights that are normally distributed with a mean of 5.191g and a standard deviation of 0.068 g. A vending machine is configured to accept those coins with weights between 5.121 g and 5.261 g. If 260 different coins are inserted into the vending machine, what is the expected number rejected coins.

Math   Statistics-And-Probability   
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Answer #1

expected number rejected coins = 0.303*260 = 78.78 = 79

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