eting there are n people, if these n people are asked to indicate the month and day of their birthday. Find the probability that at least two people coincide on their birthday. a) If 13 people attend the meeting. b) If 38 people attend the
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.
In a meeting there are n people, if these n people are asked to indicate the month and day of their birthday. Find the
a) If 13 people attend the meeting.
b) If 38 people attend the meeting.
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