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The propeller in a helicopter can be repaired at most twice. If the propeller breaks down a third time, the helicopter becomes useless. The probability

The propeller in a helicopter can be repaired at most twice. If the propeller breaks down a third time, the helicopter becomes useless. The probability of propeller breakdown during a calendar year is 0.3. What is the expected lifetime of the helicopter? Hint: Identify the distribution and use the formula from the lecture slides. What are the values of r and p ?

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