Intermath: Investigation: Data Analysis: Probability

What is the probability of selecting a multiple of 5 from a group of randomly selected integers?

***This is a generated version***NOT the arithmetic version****

Please look at the following spreadsheet for this information. The random numbers on the spreadsheet are generated from the spreadsheets random number generator. I will have it generate random numbers up to 1000. The "1" will represent a multiple of 5. The an empty cell will represent those numbers that are not multiples of 5.

I preformed 10 trials. (Every time the enter key is hit, the random numbers change.) I counted the number of "1" out of 100 random numbers produced. This gave me my probability out of 100. The 10 trials were averaged, and the probability was taken from this average. The probability was .185 that a random number would be a multiple of 5. Try it and you may get something different.

330	1		Trial 1:	24
239			Trial 2:	15
284			Trial 3:	14
902			Trial 4:	23
599			Trial 5:	22
812			Trial 6:	19
237			Trial 7:	19
473			Trial 8:	22
925	1		Trial 9:	14
570	1		Trial 10:	19
149			Average Trial:	19.1
741			Probability out of 100 trials 19.1%
388
61
542
322
428
147
268
351
507
416
776
762
701
715	1
67
418
295	1
554
803
107
477
584
243
367
309
177
112
243
237
326
913
949
385	1
47
527
171
780	1
630	1
671
502
473
581
764
98
814
264
180	1
849
409
775	1
870	1
744
716
256
545	1
50	1
66
559
957
700	1
531
26
794
188
524
271
826
738
766
769
884
133
461
105	1
114
167
58
357
928
797
959
123
284
113
98
491
164
734
	15	:Total

Home