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Math Help - Combinatorics and subsets #2

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    Combinatorics and subsets #2

    3) Of sub-clusters of positive integers {1,2,3}, {3,4,5,6}, {6,7,8,9,10}, {10,11,12,13,14,15} .. . {36, 37.38, ... 55} are clusters. This sets a 3-element subsets of the card is written and thrown into the bag. 3 cards are drawn at random bag. What is the sum of the numbers likely to be smaller than 100 by the cards?

    4) Coordinate of a point over the rational number is actually the number likely to be selected at random what is the value?
    Last edited by mr fantastic; March 31st 2011 at 07:15 PM.
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