Counting Using Multiplication

[yanelis]

Use multiplication to find the total number of outcomes in each situation.

4.) choosing one of three science courses, one of five mathematics courses, one of two English courses, and one of four social studies courses.

for this one i did 3 x 5 x 2 x 4 and got 120 possible combinations.
i was just wondering if this was correct.
if not, how i would go about solving this.

also..

6a.) choosing a book with a mystery, science-fiction, romance, or adventure theme, choosing one of five different authors for each theme, and choosing paperback or hardcover for the type of book.

6b.) What is the probability of choosing a romantic paperback by Danielle Steele?

 

[pka]

Use multiplication to find the total number of outcomes in each situation.

4.) choosing one of three science courses, one of five mathematics courses, one of two English courses, and one of four social studies courses.

for this one i did 3 x 5 x 2 x 4 and got 120 possible combinations.
i was just wondering if this was correct.
if not, how i would go about solving this.

also..

6a.) choosing a book with a mystery, science-fiction, romance, or adventure theme, choosing one of five different authors for each theme, and choosing paperback or hardcover for the type of book.

6b.) What is the probability of choosing a romantic paperback by Danielle Steele?

Your #4 is correct.

#6a \(\displaystyle (4)(5)(2)\)

Who the "h" is Danielle Steele?

 

[yanelis]

Ok thanks. That was also what I had for 6a.
Haha 6b Danielle Steele is an author. Well, I just answered 1/40...

Thanks again.