Your student email account requires you to choose a password of 4 letters followed by 1 of the digits 0 -9. The password can consist of upper case letters (26) or lower case letters (26). How many different five-character passwords can be created? 4. At a swim meet, 8 different swimmers compete in the 800 meter freestyle race. How many different ways are there for these
Permutations and Combinations
If there are 5 dishes, they can be relished in any order at a time. In permutation, it should be in a particular order. In combination, the order does not matter. Take 3 letters a, b, and c. The possible ways of pairing any two letters are ab, bc, ac, ba, cb and ca. It is in a particular order. So, this can be called the permutation of a, b, and c. But if the order does not matter then ab is the same as ba. Similarly, bc is the same as cb and ac is the same as ca. Here the list has ab, bc, and ac alone. This can be called the combination of a, b, and c.
Counting Theory
The fundamental counting principle is a rule that is used to count the total number of possible outcomes in a given situation.
3. Your student email account requires you to choose a password of 4 letters followed by 1 of the digits 0 -9. The password can consist of upper case letters (26) or lower case letters (26). How many different five-character passwords can be created?
4. At a swim meet, 8 different swimmers compete in the 800 meter freestyle race. How many
different ways are there for these swimmers to finish?
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