Combinations on the TI-83
2-20in the TI-83 Guidebook

These functions are located in math.jpg (945 bytes) menu. Press arr_rt.jpg (739 bytes) arr_rt.jpg (739 bytes) arr_rt.jpg (739 bytes) to PRB.

     

wpeF7.jpg (4665 bytes)

The random number generator.
1:rand generates a number between 0 and 1.  This could represent the values of rolling die 5 times.  iPart takes the integer par of the number. Add 1 because you can't roll a zero.

wpeFB.jpg (4683 bytes)

wpe109.jpg (4657 bytes) 5:randInt( will do the same thing as the example above.  5:randInt(lower,upper[,numtrials])
Thenumber of trials is optional
 wpe107.jpg (4747 bytes)
     
wpeFF.jpg (4655 bytes) Combinations
3:nCr is the same as C(n,r) except you must enter 52
math.jpg (945 bytes) arr_rt.jpg (739 bytes) arr_rt.jpg (739 bytes) arr_rt.jpg (739 bytes) Press 3:nCr ,Then enter 5.

wpe100.jpg (2661 bytes)

     
wpe10C.jpg (4654 bytes) Factorials !
The example above equal to
52!/(47!5!) = 2,598,960
 wpe10D.jpg (2782 bytes)