Statistics|MAT240|
The company’s Logistic manager concluded that 77% of the company cars have a lifespan at least 12 years. To support her statement, she chooses a random sample of 40 cars. a. What is the expected number and standard deviation of the lifespan of the cars? [4 marks] b. What is the probability that at least 21 cars have a lifespan at least 12 years? [3 marks] c. What is the probability that 20 to 35 cars have a lifespan of at least 12 years? [3 marks]
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