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Conference attendees may register for an additional workshop; out of a conference of 220 people, the...

Conference attendees may register for an additional workshop; out of a conference of 220 people, the probability of an attendee attending the workshop is 15%.

a. Using the binomial distribution, calculate the expected number of workshop attendees and the variance.

b. Give the probability that the workshop has fewer than 20 attendees.

c. Is the choice to approximate the binomial with the normal distribution appropriate in this case? Why or why not?

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