SOLUTION: Flip a fair coin 14 times. Find the probability of getting the following outcome. (Round your answer to three decimal places.) at most 2 heads I did (2+14)(.5)^14 and got .00

Algebra ->  Probability-and-statistics -> SOLUTION: Flip a fair coin 14 times. Find the probability of getting the following outcome. (Round your answer to three decimal places.) at most 2 heads I did (2+14)(.5)^14 and got .00      Log On


   

Question 515039: Flip a fair coin 14 times. Find the probability of getting the following outcome. (Round your answer to three decimal places.)
at most 2 heads
I did (2+14)(.5)^14 and got .000976562 and rounded it to .001 but it wasnt right
Answer by Edwin McCravy(20054) About Me  (Show Source):
You can put this solution on YOUR website!
Flip a fair coin 14 times. Find the probability of getting the following
outcome. (Round your answer to three decimal places.)
at most 2 heads
I'm not sure this is the binomial probability formula you used in its exact
form but it is equivalent:

 =

1%28.5%29%5E14%281%29%2B14%28.5%29%5E14+%2B+91%28.5%29%5E14 =

.5%5E14%281%2B14%2B91%29 =

.5%5E14%28106%29 =

.0064697266 which rounds to .006.

Edwin