Find probability of getting at least twenty percent correct
A multiple choice test consists of 60 questions. Each question has 4 possible answers of which one is correct. If all answers are random guesses, estimate the probability of getting at least 20% correct.
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General Hospital's patient account division has compiled data on the age of accounts receivable. The data collected indicate that the age of the accounts follows a normal distribution with µ= 28 days and If = 8 days. What portion of the acco
Suppose that a certain college class contains 65 students of these, 35 are seniors, 37 are economic majors. What is the probability that the student is both a senior and an economics major?
Gary Schwartz is the top salesman for his company. Records indicate that he makes a sale on 70% of his sales calls. If he calls on four potential clients
A silver dollar is flipped twice. Calculate the probability of each of the following occurring:
Each question has 4 possible answers of which one is correct. If all answers are random guesses, estimate the probability of getting at least 20% correct.
Find the probability that 70 randomly selected washing machines will have a mean replacement time less than 9.1 years.
According to Consumer Digest (July/August 1996), the probable location of personal computers (PC) in the home is as follows:
The probability the second truck is available is .51, and the probability that both trucks are available is .43. What is the probability neither truck is available?
A part randomly chosen is inspected and found to be acceptable. At this point, what is the posterior probability that the lathe tool is properly adjusted?
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