Please help me figure out these problems..I’m confused and no one is here to help me with them. Please don’t say I’m lazy, because I truly am not..math is just not my subject.
1) Use pascal’s triangle to determine how many combinations of 3 topping pizzas you can make with 10 toppings to choose from.
2) Janice’s idea of a great vacation is to read a different mystery novel each day. She knows of 16 different ones she would like to read, but she’ll only have time for 5. How many choices does she have about which 5 books to check out of the library? Explain your reasoning.
3) Lori has a different idea of a great vacation. She is an avid biker and has bought a book with ten day-long bike trips in her area. Of course, she’ll be able to do only five of these. She needs to decide which trip to do on Monday, which to do on Tuesday, and so on. (Of course, she won’t repeat the same trip twice.) How many different schedules does she have to choose from? Explain your reasoning.
And no, this isn’t my full homework.
So the answer to number one is
16•15•14•13•12 / (5•4•3•2•1)
Which is 4,368?
Why haven’t I learned Pascal’s triangle before, this is sad. I don’t understand this for some reason…
and what does the c mean
Sandra