A company has discovered that a recent batch of batteries hadmanufacturing​ flaws, and has issued a recall. In a group of 15batteries covered by the​ recall, 3 are dead. Two batteries atrandom are chosen from the package of 15
​b) Create a probability model for the number of good batterieschosen.
​c) What's the expected number of good​ batteries?
​d) What's the standard​ deviation?
