9=30*25+25*53. which = 2975. You have to split the shape into two smaller ones to make two rectangles and find the area of both and add them together. With 12, you need to find the area of both shaped and subtract the triangle form the rectangle to get 93.5.
A coin only has two sides to flip on and is equally probably flip heads or tails. If you flipped the coin 20 times you could expect to flip 10 heads and 10 tails.
