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发帖数: 139 | 1 1. In a certain game, players throw 5 standard 6-sided dice at one time. On
a single throw of the 5 dice, what is the probability of rolling "
quadruples" (exactly four dice showing the same number)?
2. Two of the numbers -3, -5/4, -1/2, 0, 1, 1/3, 1, 4/5, and 2 are selected
randomly without replacement. What is the probability that the numbers
represent the slopes of two perpendicular lines? |
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