<PRE><B>Question 1147246</B>
&lt;br&gt;
Straightforward binomial probability calculations -- although very cumbersome.&lt;br&gt;
At least 2 hits in 5 at bats means NOT 0 or 1 hits.  So&lt;br&gt;
1 - ((P(0 hits)+P(1 hit))&lt;br&gt;
{{{1 - (C(5,0)(.272^0)(1-.272)^5 + C(5,1)(.272^1)(1-.272)^4)}}}&lt;br&gt;
A good scientific calculator will do all the ugly computations for you.&lt;br&gt;
On the TI-83, binomcdf(a,b,c) will calculate the cumulative probability of AT MOST c successes in a trials if the probability of success on each trial is b.&lt;br&gt;
To find binomcdf, press 2nd-VARS (DISTR) and scroll down to A:binomcdf&lt;br&gt;
Again, since you want the probability of AT LEAST 2 hits, you want to calculate 1 minus the probability of AT MOST 1 hit:&lt;br&gt;
1 - binomcdf(5,.272,1)</PRE>