There are 20 total socks, 10 white and 10 black. This makes 10 total matching pairs of 5 pair of white and 5 pair of black. If each time you pick a sock from the drawer a sock just like it magically replaces it, what is ...
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The weight of the eggs produced by a certain breed of hen has an unknown distribution with a mean of 65 grams and a standard deviation of 5 grams. If you purchase 144 eggs, what is the approximate probability that the av ...
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Mary's parents decided to buy a new house for their retirement. They are looking at $200,000 lake house. Since their credit history is excellent, they can get approved for 3.6% annual interest on 30-year mortgage. In the ...
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Suppose that A, B and C are events in a sample space S, such that: A and B are equally likely; C is four times as likely as B; B and C are independent; if either B or C occurs, then A cannot occur; at least one of A, B o ...
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A restaurant manager classifies customers as regular, occasional, or new, and finds that of all customers 50%, 40%, and 10%, respectively, fall into these categories. The manager found that wine was ordered by 70% of the ...
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The time between accidents in a day in town A is given by T and the time between accidents in a day in town B is given by S. The joint density function for T and S is f ( t , s )= e^ -( t + s ) , for t ≥0 and ...
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A firm evaluates all of its projects by applying the IRR rule. Year Cash Flow 0 -$ 153,000 1 78,000 2 67,000 3 49,000 What is the project's IRR? If the required return is 11 percent, should the firm accept the project? Y ...
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In a recent year, 8,415,394 male students and 4,879,215 female students were enrolled as undergraduates. Receiving aid were 62.9% of the male students and 68.3% of female students. Of those receiving aid, 41.9% of the ma ...
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Jane and John Doe are twins. Jane saves $10,000 per year from age 25 to 34 and nothing from age 35 onward (10 years of saving in total). John saves nothing from age 25 to 34 and $10,000 from age 35 to 64 (30 years of sav ...
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The J.O. Supplies Company buys calculators from a Korean supplier. The probability of a defective calculator is 20%. If 15 calculators are selected at random, what is the probability that less than 5 of the calculators w ...
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