Editing Combination
You are currently browsing as guest..
To change this, fill in the following fields:
Username
Password
Click here to reset your password
Who can read this page?
The World
Members
Council
Admin
You have been granted an edit lock on this page
until Thu Apr 25 15:03:06 2024.
Press
to finish editing.
Who can edit this page?
World editing disabled
Members
Council
Admin
A Combination is an unordered subset of a set. For example, the 10 possible combinations of 3 letters from the set of vowels { A, E, I, O, U } are: AEI, AEO, AEU, AIO, AIU, AOU, EIO, EIU, EOU and IOU. [[[>50 The use of the word "Combination" with reference to combination locks is incorrect as the code is actually a permutation - the order matters. ]]] Order does not matter, so the choices "AEI" and "EAI" (for example) are considered to be the same. The calculation of the number of combinations makes use of the factorial notation, binomial coefficients and Pascal's triangle.