A carton contains 20 computer chips, four of which are defective. Isaac tests these chips - one

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A carton contains 20 computer chips, four of which are defective. Isaac tests these chips - one at a time and without replacement - until he either finds a defective chip or has tested three chips. If the random variable X counts the number of chips Isaac tests, find
(a) The probability distribution for X.
(b) Pr(X < 2).
(c) Pr(X = 1|X < 2)
(d) E(X)
(e) Var(X).
Distribution
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...
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