Unformatted text preview: X is binomial with parameters 6, 1 / 10. Therefore, P { X = 2 } = ( 6 2 ) (1 / 10) 2 (9 / 10) 4 = . 0984. 8. Let X be the number of the 15 that will be audited. Then X is binomial with parameters 15 and .20. Therefore, P { X ≤ 4 } = p 15 P . 2 . 8 15 + p 15 1 P . 2 1 . 8 14 + p 15 2 P . 2 2 . 8 13 + p 15 3 P . 2 3 . 8 12 + p 15 4 P . 2 4 . 8 11 = . 8358 . 13. Let X represent the number of days that the price of the stock increased. Then X is a binomial RV with parameters 6 and 1 / 3. ±or the price of the stock to be unchanged after 6 days, we must have X = 3. Therefore, P { X = 3 } = ( 6 3 ) (1 / 3) 3 (2 / 3) 3 = . 2195 . 1...
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This homework help was uploaded on 03/31/2008 for the course MATH 331 taught by Professor Anderson during the Spring '08 term at University of Wisconsin.
 Spring '08
 Anderson
 Bernoulli, Probability

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