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Texas Instruments TI-36X Solar User Manual

Page 16

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15

TI36XSUS.DOC MURFE pruning--US version Pat Hatcher
Revised: 06/17/99 4:37 PM Printed: 06/17/99 4:37 PM
Page 15 of 29

Probability

A combination is an arrangement of objects in which
order is not important, as in a hand of cards.

"

¦

calculates the number of possible combinations of

n

items taken

r

at a time.

Calculate the number of 5-card poker hands that can be
dealt from a deck of 52 cards.

52

.

5

"

¦

O

2598960.

A permutation is an arrangement of objects in which
the order is important, as in a race.

(

x

calculates

the number of possible permutations of

n

items taken

r

at a time.

Calculate the number of possible permutations for the
1st-, 2nd-, and 3rd-place finishers (no ties) in an
8-horse race.

8

.

3

(

x

O

336.

A factorial is the product of the positive integers from 1
to

n

. (

n

must be a positive whole number



69.)

Using the digits 1, 3, 7, and 9 only one time each, how
many 4-digit numbers can you form?

4

"

ƒ

24.