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year the scores for the leading portion of a test were nomally distributed with a...

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year the scores for the leading portion of a test were nomally distributed with a mean of 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 20 The probability of a student scoring less than 20 is Round to four 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 14 7 and 27 7 The probability of a student scoring between 14 7 and 27 7 is 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 9 The probability of a student scoring more than 31 9 is Round to four decimal places as needed d Identify any unusual events Explain your reasoning Choose the correct answer below O A The events in parts a and b are unusual because its probabilities are less than 0 0 O B None of the events are unusual because all the probabilities are greater than 0 05 O C The event in part c is unusual because its probability is less than 0 05 O D The event in part a is unusual because its probability is less than 0 05

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