The sum of three decimal numbers is 6 exactly one of the numbers is less than 1 what could the numbers be

Assume that the weights of quarters are normally distributed with a mean of 5.67 g and a standard deviation 0.070 g. a vending machine will only accept coins weighing between 5.48 g and 5.82 g. what percentage of legal quarters will be rejected? round your answer to two decimal places.

I'm confused on this could anyone me and show me what i need to do to solve it.

If g^-1(x) is the inverse of g (x) which statement must be true