Texas-instruments TI-73 EXPLORER User Manual download pdf (Page 57)

100

101

Chapter 2: Math Operations

7302ENG.DOC CH2 Math Operations, English Julie Hewlett Revised: 07/29/98 11:58 AM Printed: 05/19/99 8:58

AM Page 51 of 32

nPr nPr 1

3 3

Returns the number of permutations of n items taken

r number at a time. The order in which you select the items

DOES matter. items and number can be nonnegative integers

or lists of nonnegative integers.

If both arguments are lists, they must have the same number

of elements. If one argument is a list and the other a non-list,

the non-list is paired with each element in the list, and a list of

permutations is returned.

items

nPr

number

From a group of 4 items (ABCD), how many ways can you

select 2 of the items if the order does matter?

Find 4

nPr

1""

ABCD

AB AC AD

BA BC BD

CA CB CD

DA DB DC

nCr nCr 1

4 4

Returns the number of combinations of n items taken

r number at a time. In combinations, the order in which you

select the items DOES NOT matter. items and number can be

nonnegative integers or lists of nonnegative integers.

If both arguments are lists, they must have the same number

of elements. If one argument is a list and the other a non-list,

the non-list is paired with each element in the list, and a list of

combinations is returned.

items

nCr

number

AB and BA count

as two

permutations.

4 items taken

2 at a time

permutations of

1 2 ... 52 53 54 55 56 57 58 59 60 61 62 ... 363 364

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Texas-instruments TI-73 EXPLORER User Manual Page 57

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