You've decided you want a plant for your room. at the gardening store, there are 4 different kinds of plants (tulip, fern, cactus, and ficus) and 4 different kinds of pots to hold the plants (clay pot, plastic pot, metal pot, and wood pot).
if you randomly pick the plant and the pot, what is the probability that you'll end up with a tulip in a plastic pot?

First find how many possibilities there are total. We can find this simply by multiplying the total number of plants, by the total number of pots.

4 x 4 = 16

There are 16 possibilities in all. 
The probability that you'll end up with a tulip in a plastic pot is 1/16, because there's only one way to get a tulip in a plastic pot out of all 16.

The answer is 1/16. :)