A table has 6 rows and 6 columns. The 36 entries are pairs of faces of dice, one blue and one white, so each pair corresponds to one of the 36 possible rolls of two dice. Faces are depicted as colored squares, either blue or white, marked with 1, 2, 3, 4, 5, or 6 dots (pips). Column numbers correspond to values of the blue die in each pair: all pairs in column 1 have blue 1, all pairs in column 2 have blue 2, and so on. Row numbers correspond to values of the white die in each pair: all pairs in row 1 have white 1, all pairs in row 2 have white 2, and so on. For example, the top left pair at column 1, row 1 is blue 1, white 1. The column 1, row 2 pair is blue 1, white 2. The column 2, row 1 pair is blue 2, white 1, and so on. The bottom right pair is blue 6, white 6. A. Determine the number of elements in the sample space for tossing two regular 6-sided dice. n(S) = Let E be the event that the sum of the pips on the upward faces of the two dice is 8. Determine the number of elements in event E. n(E) = Find the probability of event E. (Enter your probability as a fraction.)
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.
- Column numbers correspond to values of the blue die in each pair: all pairs in column 1 have blue 1, all pairs in column 2 have blue 2, and so on.
- Row numbers correspond to values of the white die in each pair: all pairs in row 1 have white 1, all pairs in row 2 have white 2, and so on.
- For example, the top left pair at column 1, row 1 is blue 1, white 1. The column 1, row 2 pair is blue 1, white 2. The column 2, row 1 pair is blue 2, white 1, and so on. The bottom right pair is blue 6, white 6.
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