Homework Answers
a) The probability that a randomly selected person did not give the public schools an A is
= (Number of people that did not give the public schools an A)/(Total number of people surveyed)
= (329+272+242+127)/1021
= 0.950
b) The probability that a randomly selected person gave the public schools a D or an F is
= (Number of people that gave the public schools a D or F)/(Total number of people surveyed)
= (Number of people that gave the public schools a D + Number of people that gave the public schools a F)/(Total number of people surveyed)
= (272 + 127)/1021
= 0.391
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