Fraction of the polymer product

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(i) Establish that E(X) for the geometric random variable is 1/p and that V ar(X) = q/p2, where  = 1 p.

(ii) Given that for a certain geometric random variable, (= 2) = 0.0475 and (= 10) = 0.0315, determine (2 ≤ ≤ 10).

(iii) The average chain length of a polymer produced in a batch reactor is given as 200 units, where chain length itself is known to be  a  geometric  random  variable. What fraction of the polymer product is expected to have chains longer than 200 units?

Reference no: EM131001410

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