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suppose certain coins have weights that are normally distributed with a mean of 5.553g and a standard deviation of 0.053g. a vending machine is configured

suppose certain coins have weights that are normally distributed with a mean of 5.553g and a standard deviation of 0.053g. a vending machine is configured to accept those coins with weights between 5.463g and 5.643g. if 260 different coins are inserted into the vending machine, what is the expected number of rejected coins?

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