Wednesday

April 1, 2015

April 1, 2015

Posted by **Rena** on Tuesday, February 8, 2011 at 11:31pm.

- Math -
**PsyDAG**, Wednesday, February 9, 2011 at 10:27amCombinations = n!/r!(n-r)!

where n is the number of things to choose from, and you choose r of them

(No repetition, order doesn't matter)

5 factorial = 5! = 5 * 4 * 3 * 2 * 1 = 120

I'll let you do the calculations.

**Answer this Question**

**Related Questions**

Pre-Algebra [Combinations] - Need help with these- 1.How many groups of 4 ...

math - Of 30 books (15 novels, 10 history books and 5 math books), how many ways...

pre calc - A math teacher uses four algebra books, two geometry books, and three...

math - for every 20 math books a school buys, they they get 7 aditional books ...

math - lara arranged the books in her bookshelf by size. 2/10 of the books were ...

MATHS - Mrs.Koh purchased new books for the school library, of which 6 were ...

math - A student has 4 English books,3 math books,and 5 history books.In how ...

Reading - Rosalind Wiseman books Terra Elan McVoy books Susane Colasanti books ...

Math - Suppose you intend to spend no more than $60 buying books. Hardback books...

algebra - John has 36 books in his locker. He has text books,library books, and ...