Chapter 14, Lesson 5


14-5.A distinguish between and, or
Consider these two sets of numbers:
A = {positive multiples of 3 less than 20}
B = {positive multiples of 5 less than 20}
a. List all the elements that are in A and B.
b. List all the elements that are in either A or B.

14-5.B add and subtract fractions with like denominators
Simplify:

14-5.C compute simple probabilities
Slips of paper, each containing a name of a month of the year, are put into an empty box. All the months of the year are represented. If a single paper is chosen at random, what is the probability that the name begins with a J?