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[" An electric bulb will last "150" days...

[" An electric bulb will last "150" days or more "],[" with a probability of "0.7" and it will last for "],[" atmost "160" days with a probability of "0:8." The "],[" probability that the bulb will last between "150],[" and "160" days is "1=0.77^(@)" ."],[[" 1) "0.4," 2) "0.5," 3) "0.6," 4) "0.56]]

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