Currently, quarters have weights that are normally distributed with a mean of 5.670 g and a standard deviation of 0.062 g.

Currently, quarters have weights that are normally distributed with a mean of 5.670 g and a standard deviation of 0.062 g. A vending machine is configured to accept only those quarters with weights between 5.550 g and 5.790 g.a. If 280 different quarters are inserted into the vending machine, what is the expected number of rejected quarters?