Electrical engineers recognize that high neutral current in computer power system is a potential problem. A recent survey of computer power system load currents a U.S.sites found that 10% of the sites had high neutral to full-load current ratios. If a random sample of five computer power system is selected from the large number of sites in the country, what is the probability that
a) Fewer than three will have a high neutral to full-current load ratio?
b) Exactly three will have a high neutral to full-current load ratio?
c) Greater than three will have a high neutral to full-current load ratio?