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
<pre>
I'm not sure this is the binomial probability formula you used in its exact
form but it is equivalent:

{{{C(14,0)(.5)^14(.5)^0+C(14,1)(.5)^13(.5)^1 + C(14,2)(.5)^12(.5)^2}}} =

{{{1(.5)^14(1)+14(.5)^14 + 91(.5)^14}}} =

{{{.5^14(1+14+91)}}} =

{{{.5^14(106)}}} =

.0064697266 which rounds to .006.

Edwin</pre>