Have you ever wondered why so many equations are written with the variables x and y? Suppose you are reaching into a bag that contains all the letters of the English alphabet, and you pull out one letter at random to use as a variable in equations. Homework Help ✎
What is the probability that you pull out an x?
If you got the x, now what is the probability that you pull out a y?
After you take out x, how many letters are left in the alphabet?