For students of class 11-12 (age 16+)
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zadid xcalibured
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Joined: Thu Oct 27, 2011 11:04 am
Location: mymensingh

Re: Probability

Unread post by zadid xcalibured » Sun Feb 12, 2012 9:04 pm

counting probabilities is always included in combi in the general sense no matter how we count.

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Abdul Muntakim Rafi
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Joined: Tue Mar 29, 2011 10:07 pm
Location: bangladesh,the earth,milkyway,local group.

Re: Probability

Unread post by Abdul Muntakim Rafi » Thu Feb 16, 2012 12:44 am

1.a) Sakib Tanvir is right...
There are $2^6$ possible combinations of heads and tails and among them $6!/4!2!$ (i.e.HHTTTT) are 2 heads and 4 tails... so $15/64$
Man himself is the master of his fate...

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