Question 1036243
69% of men consider themselves baseball fans. If you 
randomly select 10 men and ask each if he considers 
himself a pro ball fan find the probability that the 
number who consider themselves fans is exactly 5, 
<pre>
On your TI-83 or 84,

Press 2ND VARS 

Scroll down to binompdf(   [not binomcdf( ]

and press ENTER

It's 10 trials, with p=0.69, the probability of selecting 
1 fan in 1 trial, with the x value of 5.

binompdf(10,0.69,5)

press ENTER, read

0.1128377619
</pre>
at least 6,
<pre>
Here we have to find the probability of the complement event
and subtract it from 1.  That's the probability of 5 or fewer,
so 

On your TI-83 or 84,

Press 2ND VARS 

This time, scroll down to binomcdf(   [not binompdf( ]

and press ENTER

It's 10 trials, with p=0.69, the probability of selecting 
1 fan in 1 trial, with the x value of 5.

binomcdf(10,0.69,5)

press ENTER, read

0.1679474597

Subtract from 1,

0.8320525403
</pre>
and less than 4
<pre>
That must be interpreted as "3 or less"

On your TI-83 or 84,

Press 2ND VARS 

Scroll down to binomcdf(   [not binompdf( ]

and press ENTER

It's 10 trials, with p=0.69, the probability of selecting 
1 fan in 1 trial, with the x value of 3.

binomcdf(10,0.69,3)

press ENTER, read

0.01286367757

Edwin</pre>