| 摘要 |
<p>Provided is a lottery system in which a prize for which a target value of a number of prizes won is set is drawn according to a set probability value which is associated with the prize. In the lottery system, in a stage whereat the number of prizes won has not reached a target value, a new probability is computed to be applied such that the remaining number of prizes will be won in a subsequent prescribed interval on the basis of the number of drawings which are carried out in a prior prescribed interval and the number of prizes won in the prior prescribed interval (S35), and a set value of the probability is updated on the basis of the result of the computation of the new probability (S36).</p> |
