SOLUTION: A fair coin is tossed 4 times. Let x = number of tails observed in the 4 tosses. Find the probability distribution of x.

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Question 353470: A fair coin is tossed 4 times. Let x = number of tails observed in the 4 tosses. Find the probability distribution of x.


Answer by Edwin McCravy(20055) About Me  (Show Source):
You can put this solution on YOUR website!
A fair coin is tossed 4 times. Let x = number of tails observed in the 4 tosses. Find the probability distribution of x. 
x  P(x)
0  4C0%2F2%5E4   
1  4C1%2F2%5E4  
2  4C2%2F2%5E4
3  4C3%2F2%5E4
4  4C4%2F2%5E4

Simplifying

x  P(x)
0  1%2F16   
1  4%2F16  
2  6%2F16
3  4%2F16
4  1%2F16

Simplifying further:

x  P(x)
0  1%2F16   
1  1%2F4  
2  3%2F8
3  1%2F4
4  1%2F16

If you want to know where any of that came from, just ask.

Edwin