Consumers complaints are valid
New york state has found that 30% of all consumers complaints are valid. If the state received 6000 complaints last year, about how many of them are expected to be valid? Find the standard deviation
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If the probability of a house being burgled in a year is 1 in 100, the probability of it being struck by lightning in a year is 1 in 1,000 and the probability of it being affected by flash flood in a year is 5 times greater than that of being stru
Calculate the probability that the avalanche will take place between detonations of charges 10 to 15 inclusive.
In a certain population, 0.1% of people are infected by HIV virus. A test is proposed to determine the virus carriers. For an infected person, the test gives positive result in 99% of cases; for an uninfected person, the test gives positive result
In a population of normally distributed aptitude scores of 1000 academy students with mean 70 and Standard deviation 10, how many score below 95?
A certain system has two components. There're 7 different models of first component and 11 different models of second. Any first component can be paired with any second component. A salesman should choose 2 of the first component and three of the
A salesman should choose 2 of the first component and 3 of the second to take on a sales call. How many different sets of components can the salesman take?
For the normal distribution curve with mean of 6 and a standard deviation of 5, which of the following ranges of the variable will define an area under the curve corresponding to a probability of approximately 34%?
Create a sample space for tossing a coin four times. Determine the probability of getting a simple event of three heads and one tail.
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