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Mathematics 7 Online
OpenStudy (anonymous):

SOMEONE PLEASE HELP ME a survey was conducted to find the time a person waits at a spa. The waiting times are normally distributed. The average time spent waiting is 20 minutes with a standard deviation of 4 minutes. What is the probability that the waiting time for a randomly selected person is less than 28 minutes? A. 0.025 B. 0.84 C. 0.95 D. 0.975

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