Unit Test
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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?

Explanation:

Please, find attached a figure with the complete question, including the probability distribution.

The graph does not permit to read exact values, thus you must estimate.

P(X ≥ 8) = P(X=8) + P(X=9) + P(X=10)

b. 1.25 hr

step-by-step explanation:

if you have a constant speed of 60 mph, then you have a ratio between 60 mi. to 1 hr. dividing both sides by 60 we get the ratio

1 mi. to

then mult. both sides by 75 we get the ratio

75 mi. to

simplifying we get

75 mi. to

or 1.25 hr.