Probability - Texas Instruments TI-30X IIS User Manual

Keys
1. H displays the following menu of
functions.
nPr Calculates the number of
possible permutations.
nCr Calculates the number of
possible combinations.
! Calculates the factorial.
RAND Generates a random
10-digit real number
between 0 and 1.
RANDI Generates a random
integer between 2 numbers
that you specify.
1
© 1999 T I I
EXAS NSTRUMENTS NCORPORATED

Probability

Notes
The examples on the transparency masters
assume all default settings.
A combination is an arrangement of
objects in which the order is not important,
as in a hand of cards.
A permutation is an arrangement of
objects in which the order is important, as
in a race.
A factorial is the product of all the positive
integers from 1 to n , where n is a positive
whole number  69.
To control a sequence of random numbers,
you can store (L) an integer to RAND
just as you would store values to memory
variables. The seed value changes randomly
when a random number is generated.
For RANDI, use a comma to separate the
2 numbers that you specify.
TI-30X ÙS: A Guide for Teachers
11
68