HP 15C Instrukcja Użytkownika Pobierz pdf (Strona 48)

48 Section 4: Statistics Functions

How many different four-card hands can be dealt from a deck of 52 cards?

Keystrokes

Display

52 v 4

Fifty-two (y) cards dealt four

(x) at a time.

270,725.0000

Number of different hands

possible.

The maximum size of x or y is 9,999,999,999.

Random Number Generator

Pressing ´# (random number) will generate a random number

(part of a uniformly distributed pseudo-random number sequence) in the

range 0  r <1.

At initial power-up (including reset of Continuous Memory), the HP-15C

            

number sequence. Any time you generate a random number, that number

becomes the seed for the next random number. You can initiate a different

random number sequence by storing a new seed for the random number

generator. (Repetition of a random number seed will produce repetition of

the random number sequence.)

O´# will store the X-r < 1) as a new seed

for the random number generator. (A value for r outside this range will be

converted to fit within the range.)

l´# will recall to the display the current random number seed.

Keystrokes

Display

.5764

0.5764

Stores 0.5764 as random number seed.

(The ´ keystroke may be omitted.)

O´

0.5764

´#

0.3422

Random number sequence initiated by the

above seed.

´#

0.2809

−

0.0000

Passes the spectral test (D. Knuth, The Art of Computer Programming. Vol. 2. Seminumerical Algorithms,

Third Edition, 1998).

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