Statistical Calculations 127
Example
Using five books labeled A, B, C, D, and E, how many different ways can three books be
placed on a shelf?
Table 12-15 Example calculating permutations
Combinations
The
n
C
r
function calculates the number of different sets, or combinations, of
n
items taken
r
at a time. No item can occur more than once in the set of
r
items, and different orders of the
same
r
items are not counted separately. This is calculated using the formula:
Example
Using five colored balls, how many different color combinations of three colors can be
chosen?
.
Random Number and Seed
The 10bII+ includes a random number generator function that generates a pseudo-random
number in the range 0 <
x
< 1. To store a seed value, type a positive number and press
\w]6
. Storing a value of 0 will select a random number and store it as the
seed value.
Keys
Display
Description
V]<D4
60.00
Calculates permutations of
n
items taken
r
at a time.
or, using
Æ
:
VÆD]<
60.00
COMBINATIONS
n
!
n r
–
(
)
!
r
!
----------------------
=
Table 12-16 Example calculating combinations
Keys
Display
Description
V]9D4
10.00
Calculates combinations of
n
items taken
r
at a time.
or, using
Æ
:
VÆD]9
10.00
Содержание 10bII+
Страница 1: ...i HP 10bII Financial Calculator User s Guide HP Part Number NW239 90001 Edition 1 May 2010 ...
Страница 3: ...iii HP 10bII Financial Calculator ...
Страница 30: ...At a Glance 22 ...
Страница 144: ...Statistical Calculations 136 ...
Страница 183: ...Warranty Regulatory and Contact Information 9 ...
Страница 184: ...Warranty Regulatory and Contact Information 10 ...