A lot containing 7 components is sampled by o quality inspector. The lot contains 4 good components and 3 defective components. Sample of 3 is taken by the inspector. Let X represent the number of good components in sample. Probability distribution of X is f( x)= / 4\[3 x/[3-x x=0,1,2,3 7 3 What is the expected value of the number of good components in this sample? What is the variance and standard deviation of the discrete random variable?

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