Question 1060277
<pre>
Binomial probability:

n=20
p=1/6
x=2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20


1 - B(n=20,p=1/6,x=0) - B(n=20,p=1/6,x=1)

{{{1 - "C(20,0)"(1/6)^0(5/6)^20-"C(20,1)"(1/6)^1(5/6)^19}}}

{{{1-1*1*0.0260840533-20(0.1666666667)(0.031300864)}}}

{{{0.8695797335}}}

On TI-83 or 84

1-binomcdf(20,1/6,1)

Edwin</pre></b>