Permutation and Combination questions answer pdf -:
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What is Combination in Math?
An arrangement of objects in which the order is not important is called a combination.This is different from permutation where the order matters. For example, suppose we are arranging the letters A, B and C. In a permutation, the arrangement ABC and ACB are different. But, in a combination, the arrangements ABC and ACB are the same because the order is not important.
What is the Combination Formula?
The number of combinations of n things taken r at a time is written as C(n, r).
Solution:
How to use the Combination Formula to solve word problems?
Example:
In how many ways can a coach choose three swimmers from among five swimmers?
There are 5 swimmers to be taken 3 at a time.
Using the formula:
The coach can choose the swimmers in 10 ways.
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