Fractions
You have a drawer full of Tee-shirts: 4 long sleeved, 10 short sleeved, 8 blue, and 6 white. You pick one tee- shirt. This is the probability that the tee-shirt is white and long sleeved
What is 4/14 * 6/14 or 1/7 * 3/7 or 3/49