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An investment analyst found that a certain stcok price goes up or down a point every day with pro...

An investment analyst found that a certain stcok price goes up or down a point every day with probabilities 0.75 and 0.25, respectively. Daily flucturations are independent. Fidn the expected value and the variance of the first day when the stock price goes up? What is the MGF of this day? What is the probability that this day happens on the sixth day?

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Soluion Given daļā Every dag probabili ties P=0,15 E(x) = By substituting p, Valua in E(X) equation then we ger ECX) 33 33 -

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