Wednesday
April 1, 2015

Homework Help: statistics

Posted by Jane on Friday, March 16, 2012 at 1:57pm.

it has been reported that 40% of all internet users have been attacked by viruses. If 20 people are randomly surveyed, find the following probabilities:

a. At least 3 have been attacked
b. No more than 5 have been attacked
c. less than 15 have been attacked

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