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OpenStudy (micco300):
If 4 lightbulbs are picked from the box randomly, the probability that at most 2 of them are defective is .
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OpenStudy (youngster):
it is a 50/50 chance
OpenStudy (youngster):
it's like flipping a coin half is heads and half is tails. Just like the light bulbs. half are working and half are not
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