Probability - Texas Instruments TI-30Xa Solar User Manual

Probability

A combination is an arrangement of objects in which
order is not important, as in a hand of cards. " i
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 " i 5 J
2598960.
A permutation is an arrangement of objects in which
the order is important, as in a race. " j 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 " j 3 J
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 " v
24.
12