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