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One hundered draws are made at random from a hopper with two marbles: one is red the other is blue. Independently, a coin is tossed one hundered times. Find the expected value and SE for the difference between the number of times a blue marble is drawn and the number of times the coin lands on heads.
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    Carlos Rodriguez <>
    This problem was contributed by a student in Elementary Statistics. It is offered as it is with no warranty of any kind
    Last modified: Wed May 13 12:29:11 EDT 1998