Posted by Hanna on Friday, September 7, 2012 at 6:51pm.
100 choose 4, or C(100,4) where
C(n,r) is defined as
C(n,r)=n!/[r!(n-r)!]
Think of choosing the first number out of 100 choices. We can choose the next number from the remaining 99 numbers, then 98, then 97.
By the rule of multiplication of a multi-step experiment, we have
100*99*98*97 possible outcomes, which correspond exactly to C(100,4).
Related Questions
Math - You're friend tells you about a new online music site called ComboAl...
COMBINATION!!MATH!!!hurryyy!!! - Cards are drawn at random from a 52-card deck. ...
Math - From the decimal form of 1/13 we pick 99 consecutive digits and treat it ...
math - what is the smallest number that can be formed using the digits 4,9,2,1,3...
7th grade math help please - 12. Which of the following numbers is an example of...
Math - Using only the numbers 1-8 without repeating any of them, what is _+_=_-_...
Math - What is the greatest 7 digit number without repeating any digit?
Math - If I have 4 people and I want to take a picture of them standing side by ...
Math - 40-3n=-23 what is n? 2/3-6h=-13/6 what is h? write as a equation,then ...
Math - What are irrational, rational, and natural numbers? A rational number is ...
For Further Reading
