Exam 8: Contingent Payments

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The random walk theory of stock prices states that price movements in disjoint time periods are independent of each other.The probability that the value of a portfolio of stocks invested in companies listed on the TSE300 rises in any one year is 0.60.What is the probability that the portfolio's value moves in the same direction in both of the next 2 years?

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A hydro company finds that 80% of its customers pay a given monthly bill in full.Suppose 2 customers are chosen at random from the list of all customers.What is the probability that at least one of the two customers will pay their next monthly bill in full?

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