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An Urn Contains 20 Marbles,each of Which Shows a Number

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An urn contains 20 marbles,each of which shows a number.Eight marbles show 1,five marbles show 2,and seven marbles show 3.A marble is randomly selected and the number X that shows is observed.The mean of X is


A) 1.
B) An urn contains 20 marbles,each of which shows a number.Eight marbles show 1,five marbles show 2,and seven marbles show 3.A marble is randomly selected and the number X that shows is observed.The mean of X is A) 1. B) C) D) E)
C) An urn contains 20 marbles,each of which shows a number.Eight marbles show 1,five marbles show 2,and seven marbles show 3.A marble is randomly selected and the number X that shows is observed.The mean of X is A) 1. B) C) D) E)
D) An urn contains 20 marbles,each of which shows a number.Eight marbles show 1,five marbles show 2,and seven marbles show 3.A marble is randomly selected and the number X that shows is observed.The mean of X is A) 1. B) C) D) E)
E) An urn contains 20 marbles,each of which shows a number.Eight marbles show 1,five marbles show 2,and seven marbles show 3.A marble is randomly selected and the number X that shows is observed.The mean of X is A) 1. B) C) D) E)

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