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Author Question: The manager of a bank recorded the amount of time each customer spent waiting in line during peak ... (Read 160 times)

londonang

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on: Jul 25, 2018
The manager of a bank recorded the amount of time each customer spent waiting in line during
  peak business hours one Monday. The frequency table below summarizes the results.
 
  Waiting Time
  (minutes)
  Number of
  Customers
  0-3 9
  4-7 10
  8-11 12
  12-15 4
  16-19 4
  20-23 2
  24-27 2
  If we randomly select one of the customers represented in the table, what is the probability that the
  waiting time is at least 12 minutes or between 8 and 15 minutes?
  A) 0.558 B) 0.651 C) 0.093 D) 0.727

Question 2

A die is rolled 9 times and the number of times that two shows on the upper face is counted. If this
  experiment is repeated many times, find the mean for the number of twos.
 
  A) 7.5 B) 1.5 C) 2.25 D) 3


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Marked as best answer by a Subject Expert

owenfalvey

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Reply #1 on: Jul 25, 2018
Answer to Question 1

A

Answer to Question 2

B


londonang

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Reply #2 on: Jul 25, 2018
Both answers were spot on, thank you once again


owenfalvey

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Reply #3 on: Jul 25, 2018
Great! Please up vote :D


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