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  1. J

    Maths Paper 42 2013

    i) 6/8 x 5/7 x 4/6 = 5/7 ... as it is without replacement so total number decreases each time. ii) (2/8 x 6/7 x 5/6) + (6/8 x 2/7 x 5/6) + (6/8 x 5/7 x 2/6) = 5/28 ....the buttons can be picked in different ways... b) x/25 x (x-1)/24 = 7/100 ...as there is no replacement both values will be -1...
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