Mathematics, 13.11.2019 03:31 svarner2001

The average time taken to complete an exam, x, follows a normal probability distribution with mean = 60 minutes and standard deviation 30 minutes.

what is the probability that a randomly chosen student will take more than 30 minutes to complete the exam?

select one:

a. 0.9772

b. 0.8413

c. 0.5

d. 0.1587

Answers: 3

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