Posted by Math on Tuesday, May 15, 2007 at 2:11pm.
I had to solve for this:
1) choose 4 people from a class of 12
12C4 = 495
2) chosse 8 people from a class of 12
12C8 = 495
why is it that they both eqaul 495? maybe I am doing it wrong but I am confused why do they both equal 495?
They are the same, both 2 from the mean of 6. If you do 12C6, you get the max. A neat thing to do is to graph each possibilty,
12C3 and so on until
Graph number combinations vs n.
If you smooth it up, you get the binomial approximation to the normal probability curve.
to go along with what bobpursley showed you, try to finish this pattern
1 2 1
1 3 3 1
1 4 6 4 1
1 5 10 10 5 1
to get a new number, add the one immediately above and one to the left, the left column is made up of 1's
This is Pascal's Triangle. Look at the row that starts with 1 12 ...
Did you notice something?
Answer This Question
More Related Questions
- Math - There are three times as many people in the psychology class as in the ...
- math plz help Irving - How many ways can 4 students be chosen from a class of 12...
- social studies 9 - using the data in table5-1, determine how large a part of ...
- Algebra - There are three times as many people in the psychology class as in the...
- math - Mr. Smith’s first period class had an average of 90% on the first test, ...
- Math - 3.Max says there were 6 students wearing shorts in his math class. He is ...
- social studies - What is not an objective of the constitution a. Protect the ...
- maths - Suppose that in a class there are 8 people, 5 boys and 3 girls. We want ...
- math - the smallest number of people in a room where the probability of two of ...
- math - the recipe for pasta salad will serve 6 people, and there are 32 people ...