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What is the probability that neither of the questionnaires

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Question 1: Suppose that a marketing firm sends questionnaires to two different companies. Based on historical evidence, the marketing research firm believes that each company, independently of the other, will return the questionnaire with a probability of 0.30. What is the probability that neither of the questionnaires will be returned? Place your answer, rounded to 2 decimal places, in the blank. For example, 0.23 is a legitimate entry.

Question 2: A coffee shop serves an average of 75 customers per hour during the morning rush. Find the probability that less than 60 customers arrive in an hour during tomorrow's morning rush. Round answer to 4 decimal places.

Question 3: It is known that 40% of adult workers have a high school diploma. If a random sample of 14 adult workers is selected, what is the expected number of adult workers with a high school diploma? (That is, what is E(X)?)  (Do not round answer)

Question 4: The following table summarizes the distribution of students by the academic class in a class.

Frequency:

Freshman 23

Sophomore 16

Junior 10

Senior 1

If a student is randomly selected from this class, then what is the probability that this student will be a senior or freshman? (keep 2 decimal places)

Reference no: EM132394863

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