The time to recharge the flash is tested cell-phone cameras. The probability that a camera passes the test is 0.8, and the cameras perform independently. What is the expected number of cameras tested to obtain the third failure?

College Algebra
7th Edition
ISBN:9781305115545
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter9: Counting And Probability
Section9.3: Binomial Probability
Problem 2E: If a binomial experiment has probability p success, then the probability of failure is...
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The time to recharge the flash is tested cell-phone cameras. The probability that a camera passes the test is 0.8, and the cameras perform independently. What is the expected number of cameras tested to obtain the third failure?

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