A box contains seven 40-W bulbs, four 60-W bulbs, and six 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? (Round your answer to three decimal places.)
1 answer:
Answer: 2.833
Step-by-step explanation:
Add up the amount of light bulbs: (7+6+4).
Divide 17 (^the sum^) by 6 (the amount of 75 watt bulbs).
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