Question #184454

Tossing 4 coins simultaneously finds the probability of getting 2 heads and 2 tails. 


1
Expert's answer
2021-05-07T08:53:54-0400

Assuming a fair coin, independent tosses and 0 chance of landing on the edge.

There are 16 possible results. (42)=4×32=6\binom{4}{2}=4\times\frac{3}{2} = 6 of them have 2 heads. Since all 16 are equally likely, the chance is 616=38=0.375\frac{6}{16} = \frac{3}{8} = 0.375


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