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2-12 Math, Angle, and Test Operations
To display the MATH PRB menu, press
I 6
. When you select a menu item,
the name is copied to the cursor location. Functions that are valid for lists return
a list calculated on an element-by-element basis.
MATH NUM PRB
1: RAND
Random number generator.
2: nPr
Number of permutations.
3: nCr
Number of combinations.
4: !
Factorial.
5: RANDINT(
Random integer generator.
RAND
(random number,
MATH PRB
, item 1) generates and
returns a random number greater than 0 and less than 1 (as in
the first example below). A random number is generated from
a seed value. To control a random number sequence, first
store an integer seed value in
RAND
. In the second example
below,
1
is stored to
RAND
so that the TI
-
80 uses 1 as the seed
value for generating random numbers.
Note: When you reset the TI
-
80,
RAND
is set to the factory
seed value, which is 0.
MATH PRB (Probability) Operations
MATH PRB
Menu
RAND