Ask iit jee aieee pet cbse icse state board community Discussion Response Post to: A bag contains tickets numbered 1,2,3..........50 of which 5 tickets x1,x2,x3,x4,x5 are drawn at
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Transmigrator (494)

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For x3 to be = 30, x1 & x2 must be less than 30 along with x4 & x5 being greater than 30.....

 

Now, No. of all possible selections = 50C5 = a

 

No of selections such that x3 is equal to 30 = 29C2 20C2 = b

 

Hence, Probability = b/a = (U calculate it)


Common sense is not very common. --- Voltaire Man is born free, but is everywhere in chains.-------Jean Jacques Rosseau The rule of SATAN is inevitable~~~~~~transmigrator
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