A survey of college students taking the professional exam to be certified as public school teachers shows that 15 percent fail. On a national exam day, 12,000 students take the test. Let x denote the number who fail. The mean and standard deviation of the random variable x are, respectively:
a. 1800; 1530
b. 1800; 39.11
c. 10,200; 1530
d. 10,200; 39.11
e. 1200; 35.71
Question 2
A Company manufactures women's hosiery. The company sells slightly irregular panty hose through a mail-order catalog service. If the company produces 300,000 pairs of hose per day and the probability of a pair not being irregular is 0.92, the average number that will be available for the catalog order department is:
a. 22080
b. 148.59
c. 24000
d. 154.92
e. 15.49
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