nfirmation code consists of five letters followed by two digits, all of which can be repeated. Which of these is/are appropriate counting techniques to figure out how many confirmation numbers are possible? i) Fundamental Counting Principle ii) Permutations iii) Combinations Choose the best answer below and explain: None of these? 1 and 2 only
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.
A confirmation code consists of five letters followed by two digits, all of which can be repeated. Which of these is/are appropriate counting techniques to figure out how many confirmation numbers are possible?
i) Fundamental Counting Principle
ii) Permutations
iii) Combinations
Choose the best answer below and explain:
None of these?
1 and 2 only?
2 and three only?
1 and 3 only?
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