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In a recent year, the scores for the reading portion of a test were normally distributed, with a mean oi 20.4 and a standard deviation of 5.5. Complete parts (a)
through (d) below. (a) Find the probability that a randomly selected high school student who took the reading portion of the test has a score that is less than 13. The probability ot a student scoring less than 18 is :|.
(Round to tour decimal places as needed.) (b) Find the probability that a randomly selected high school student who took the reading portion of the test has a score that is between 13.5 and 27.3. The probability ot a student scoring between 13.5 and 2?.3 is D.
(Round to four decimal places as needed.) (c) Find the probability that a randomly selected high school student who took the reading portion of the test has a score that is more than 31.7. The probability ot a student scoring more than 31.? is D.
(Round to tour decimal places as needed.) (d) Identify any unusual events. Explain your reasoning. Choose the correct answer below. 0 A. The event in part {a} is unusual because its probability is less than [1.115. O B. The event in part (c) is unusual because its probability is less than 11.05. C) C. None of the events are unusual because all the probabilities are greater than 0.05. O D. The events in parts {a} and (b) are unusual because its probabilities are less than 0.05.

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