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?

A probability distribution has the number of hours on the x-axis and the probability on the y-axis. The probability of 6 hours is 0.02; 7 hours is 0.11; 8 hours is 0.61; 9 hours is 0.15; 10 hours is 0.09.
0.62
0.78
0.84
0.96

Question

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?

A probability distribution has the number of hours on the x-axis and the probability on the y-axis. The probability of 6 hours is 0.02; 7 hours is 0.11; 8 hours is 0.61; 9 hours is 0.15; 10 hours is 0.09.
0.62
0.78
0.84
0.96

supie · Answer

Is there a graph?

Mercury · Answer

"probability that the worker works **at least** 8 hours

notice how the shift lengths given in the distribution are: 6,7,8,9, and 10 hours

since it wants ** at least ** 8 hours, simply add up the probabilities for 8, 9 and 10 hours