A survey of students to determine if they had a pierced ear was given. The results are summarized in the table below. If one person is selected at random find the probability that the person is: a. a female given they are pierced. b. a male given they have pierced. Pierced Not Pierced Total Male Female 36 144 180 288 32 320 Total 324 176 500
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.
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