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27-05-2018
Mathematics

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Probability if you toss a coin 4 times, how many different sequences of tosses will give exactly 3 heads and 1 tail or exactly 1 head and 3 tails?

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27-05-2018

3 H and 1 T l:- number of sequences = 4P3 = 4*3*2*1 / 3*2*1 = 4

Similarly for 3T and 1 H there are also 4

Total = 8 (answer).

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