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Mathematics, 13.02.2020 18:27 kardav0435
A box contains nine 40-W bulbs, four 60-W bulbs, and five 75-W bulbs. If bulbs are selected one by one in random order, what is the probability that at least two bulbs must be selected to obtain one that is rated 75 W?
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A box contains nine 40-W bulbs, four 60-W bulbs, and five 75-W bulbs. If bulbs are selected one by o...
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