Question

Two computer specialists are completing work orders. Incoming
jobs are randomly assigned to the first specialist with probability
0.69 and to the second specialist with probability 0.31. The time
it takes the first specialist to complete an order is a normal
random variable with mean 5.5 hours and standard deviation 1 hour
and the time it takes the second specialist is normal with mean 6.3
hours and standard deviation 1.5 hours. Please give your answers to
the nearest 0.001.

**Part a)**

You submit an order. What's the probability it will take more than
3 hours?

**Part b)**

A certain order was submitted 5 hours ago and is still not ready.
What is the probability that the first specialist is working on
it?

Answer #1

Visit the NASDAQ historical prices weblink. First, set the date
range to be for exactly 1 year ending on the Monday that this
course started. For example, if the current term started on April
1, 2018, then use April 1, 2017 – March 31, 2018. (Do NOT use these
dates. Use the dates that match up with the current term.) Do this
by clicking on the blue dates after “Time Period”. Next, click the
“Apply” button. Next, click the link...

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