Question

2. A box contains 4 white and 6 black balls. A random sample of size 4 is chosen. Let X denote the number of white balls in the sample. An additional ball is now selected from the remaining 6 balls in the box. Let Y equal 1 if this ball is white and 0 if it is black. Find (a) Var(Y|X=0). (b) Var(X)Y= 1).

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At first we will consider both problem separately and then we will calculate the required probabilities for each problem and get our required results...

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