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A survey of U.S. adults found that 69% of those who text on cell phones receive spam or unwanted messages. You randomly select 100 U.S. adults who text on cell phones.

A) Determine whether you can use a normal distribution to approximate the binomial distribution.

B) Find the probability that the number who receive spam or unwanted messages is exactly 70.

C) Find the probability that the number who receive spam or unwanted messages is at least 70.

D) Find the probability that the number who receive spam or unwanted messages is fewer than 70.

E) Would any of the events in B through D be considered unusual?

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