Suppose that, for a certain exam, a teacher grades on a curve. Frequency 0.1% 2.2% 34.1% 34.1% 2.2% 0.1% 13.6% 13.6% -30. μ-20 -10 μ +lo +2σ +30 It is known that the mean is 70 and the standard deviation is 10. There are 40 students in the class. If an exam paper is selected at random, what is the probability that it will be a failing paper? (Round your answer to three decimal places.) ASK YOUR TEACH