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Suppose that a box contains 6 pens and that 4 of them are defective. A sample...

Suppose that a box contains 6 pens and that 4 of them are defective. A sample of 2 pens is selected at random without replacement. Define the random variable XX as the number of defective pens in the sample. If necessary, round your answers to three decimal places.

Write the probability distribution for XX.

xx P(X=xX=x)



What is the expected value of X?  

Math   Statistics-And-Probability   
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