The human resources manager at a company records the length, in hours, of one shift at work, X. He creates the probability distribution below. What is the probability that a worker chosen at random works at least 8 hours?
The probability that a worker chosen at random works at least 8 hours is 0.84
At least 8 hours simply means 8 hours and above
Thus, the probability of at least 8 hours can be obtained as illustrated below:
P(At least 8 hours) = P(8) + P(9) + P(10)
P(At least 8 hours) = 0.61 + 0.15 + 0.08
P(At least 8 hours) = 0.84
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