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![[Post New]](/templates/default/images/icon_minipost_new.gif) 16 Mar 2008 08:44:37 IST
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. Two numbers are selected at Random (without replacement) from the first six positive integers. Let X denotes the larger of the two numbers obtained. Find E(X) .
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16 Mar 2008 09:04:48 IST
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X can take values from 2 to 6
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16 Mar 2008 17:23:56 IST
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Total no of pairs = 6c2 = 15 now no of cases s.t . X= 1 is 0 X=2 is 1 X=3 is 2 X=4 is 3 X=5 is 4 X=6 is 5 so , E( X ) =1/15 { 2.1 + 3.2 + 4.3 + 5.4 + 6.5} = 14/3
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