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# Mean

I.) The number of construction projects on a college campus follows Poissan's dist. with a mean=3. The probability that exactly two projects are currently taking place is:

1.) 0.4230

2.) 0.224

3.) 0.00

4.) 0.1990

J.) In an assembly line with robots, a particular component can be installed in 90 seconds if holes are properly drilled and 12 minutes if holes have to be redrilled. 20 of the components are in stock and it's assumed that 2 will have improperly drilled holes. 5 of the components are selected at random from the 20. What is the probability that all 5 components will fit properly?

1.) 0.1

2.) 0.5526

3.) 0.4

4.) 0.0250

#### Solution Summary

I.) The number of construction projects on a college campus follows Poissan's dist. with a mean=3. The probability that exactly two projects are currently taking place is:

1.) 0.4230

2.) 0.224

3.) 0.00

4.) 0.1990

J.) In an assembly line with robots, a particular component can be installed in 90 seconds if holes are properly drilled and 12 minutes if holes have to be redrilled. 20 of the components are in stock and it's assumed that 2 will have improperly drilled holes. 5 of the components are selected at random from the 20. What is the probability that all 5 components will fit properly?

1.) 0.1

2.) 0.5526

3.) 0.4

4.) 0.0250

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