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As the example shows the card contains 3 rows and 9 columns. On each row are exactly 5 numbers. The other four cells in each row are blank, or free squares. From other examples I have seen the first row contains the numbers 1 to 10, the second 11 to 20, and so on, but mathematically this doesn’t matter. Winning events I have heard of all are based on covering rows only, so mathematically speaking the game could played on a 3 by 5 card with all numbers covered, the odds would be the same.
The purpose of this appendix is to show the probability of covering (1) at least one row, (2) at least 2 rows, and (3) all three rows, in any given number of calls from 5 to 90. For example, the table shows the probability of covering at least one row in 50 calls on any one card is 0.139289864, or 13.93%. |
