A bag contains 4 red, 7 blue, 8 green, and 5 white marbles. What is the theoretical probability that a randomly selected marble is green?

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.