Calculus and Above

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I need to know the answer to a probability question.

The total number of employees is 30,000

Annually 25% of the total employees will be selected randomly for a drug test.

Annually 10% of the total employees will be selected randomly for a alcohol test.

Annual drug & alcohol random selections will be spread out equally over the course of 4 quarters. Annual selections for drug and alcohol will be done independently of one another.

What is the probability of being selected for both drug and alcohol tests in the same quarter?

How many employees could be selected for both drug and alcohol on any given quarter in the course of a year?

looking over 8 years of data what would be the annual avreage of this type of selection?

The total number of employees is 30,000

Annually 25% of the total employees will be selected randomly for a drug test.

Annually 10% of the total employees will be selected randomly for a alcohol test.

Annual drug & alcohol random selections will be spread out equally over the course of 4 quarters. Annual selections for drug and alcohol will be done independently of one another.

What is the probability of being selected for both drug and alcohol tests in the same quarter?

How many employees could be selected for both drug and alcohol on any given quarter in the course of a year?

looking over 8 years of data what would be the annual avreage of this type of selection?

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