Batteries in a group of 10 batteries 3 are dead you choose


Batteries. In a group of 10 batteries, 3 are dead. You choose 2 batteries at random.

a) Create a probability model for the number of good batteries you get.

b) What's the expected number of good ones you get?

c) What's the standard deviation?

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Basic Statistics: Batteries in a group of 10 batteries 3 are dead you choose
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