In a Box of 7 Batteries,6 Are Dead

question 103

Multiple Choice

In a box of 7 batteries,6 are dead.You choose two batteries at random from the box.Let the random variable X be the number of good batteries you get.Find the expected value of X.

• A)μ = 0.36
• B)μ = 0.92
• C)μ = 0.14
• D)μ = 1.71
• E)μ = 0.29

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