In a lot of 15 truss rods, 12 meet a tensile strength specification. Four rods are chosen
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In a lot of 15 truss rods, 12 meet a tensile strength specification. Four rods are chosen at random to be tested. Let \(X\) be the number of tested rods that meet the specification.
a. Find \(P(X=3)\).
b. Find \(\mu_{X}\).
c. Find \(\sigma_{X}\).
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