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...

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?