205spec1part2probf7

205spec1part2probf7 - MATH 205 SPECIAL ASSIGNMENT#1 PART 2...

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Unformatted text preview: MATH 205 SPECIAL ASSIGNMENT #1 PART 2: PROBABILITY 1 ) If two events, A and B , are such that P ( A ) = . 4 , P ( B ) = . 8 , and P ( ¯ A ∩ B ) = 0 . 5 . (a) Find P ( A ∩ B ) (b) Find P ( A | B ) (c) Find P ( A ∩ B | A ∪ B ) (d) Determine if A and B are independent. Show your work. (e) Determine if A and B are mutually exclusive. Show your work. 2 ) If A and B are independent events with P ( A ) = 0 . 5 and P ( B ) = 0 . 2 , find the following: (a) P ( A ∪ B ) (b) P ( ¯ A ∩ B ) (c) P ( ¯ A ∪ B ) (d) P ( ¯ A | B ) (e) P ( A | ¯ B ) 3 ) From a box with 40 red balls, 40 green balls and 20 blue balls, pick 6 balls one at a time at random and without replacement. Find the following probabilities: (a) P ( red on 1st, 3rd and last while the remaining balls not red ) (b) P ( 3 red ) 4 ) Roll two dice and let x = (largest - smallest) of numbers on the two dice and define the events A = { x is even } , B = { x is odd } , and C = { x is less than 3 } . (a) Determine if A and B are mutually exclusive. (b) Determine if A and B are independent. (c) Find P ( A | B ) (d) Find P ( A | C ) 5 ) An advertising agency notes that approximately 1 in 50 potential buyers of a product sees a given magazine ad and 1 in 5 sees a corresponding ad on television. One in 100 sees both. One in 3 actually purchases the product after seeing the ad, 1 in 10 without seeing it. What is the probability that a randomly selected potential customer will purchase the product?the probability that a randomly selected potential customer will purchase the product?...
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This note was uploaded on 02/23/2011 for the course MATH 444 taught by Professor Any during the Fall '10 term at Roosevelt.

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205spec1part2probf7 - MATH 205 SPECIAL ASSIGNMENT#1 PART 2...

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