company is considering drilling four oil wells. The probability of success for each well is 0.4 , independent of the results for any other well. The cost of each oil is $ 200,000. Each well that is successful will be worth $ 600,000. a) What is the probability that one or more wells will be successful ? b) What is the expected number of successes? c) What is the expected gain? d) What will be the gain if only one well is successful .

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