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In: Statistics and Probability

pls give the process of function!thank you. 1.​Revenue Canada spends, on the average, 30 minutes per...

pls give the process of function!thank you.

1.​Revenue Canada spends, on the average, 30 minutes per income tax return it decides to audit. These audit times are known to be normally distributed with a standard deviation of 10 minutes.

a.​Suppose a tax return is selected at random for audit. What is the probability that it will take less than 24 minutes to complete the audit?

b.​In less than how many minutes that 90% of all these returns can each be audited?

c.​Suppose two tax returns are selected at random. What is the probability that at least one of the two will take less than 24 minutes to audit?

d. Suppose 5 returns are selected at random. What is the probability that the average time taken to audit these 5 returns will be at least 24 minutes?

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please rate me high.

orchestra answered 2 years ago
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