Kelsey is writing a -you note to a friend. she has 9 kinds of cards and 7 kinds of envelopes that fit the cards. she has 3 designs of first-class stamps, although she only needs to use one. finally, kelsey has to pick a color of pen with which to write the note, and she has 2 to choose from. how many different ways can the -you note look?

378

Step-by-step explanation:

            She has 9 kinds of cards out of which she has to chose only 1.

The number of ways of doing this is 9 (she can pick any one of them).

            She has 7 kinds of cards out of which she has to chose only 1.

The number of ways of doing this is 7 (she can pick any one of them).

            She has 3 designs of first-class stamps out of which she has to chose only 1.

The number of ways of doing this is 3 (she can pick any one of them).

            She has to pick the color of pen and she has 2 to choose from.

The number of ways of doing this is 2 (she can choose any one of them).

She has to do Work 1 and Work 2 and Work 3 and Work 4.

∴By the fundamental counting principle, the total number of different ways in which the thank-you note can look is 9×7×3×2 = 378