title: Query in SQL to show average price for cars of same brand
body: <p>How do I type in query in table "cars" to give me 2 brands I want(there are many cars with same brand) and average prices of all the cars of that brand.
  <a href="http://i.stack.imgur.com/k7fmn.jpg" rel="nofollow">http://i.stack.imgur.com/k7fmn.jpg</a></p>