Construct the call graph for a set of seven telephonenumbers 555-0011, 555-1221, 555-1333, 555-8888,555-2222, 555-0091, and 555-1200 if there were threecalls from 555-0011 to 555-8888 and two calls from555-8888 to 555-0011, two calls from 555-2222 to555-0091, two calls from 555-1221 to each of theother numbers, and one call from 555-1333 to each of555-0011, 555-1221, and 555-1200.
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.
Construct the call graph for a set of seven telephone
numbers 555-0011, 555-1221, 555-1333, 555-8888,
555-2222, 555-0091, and 555-1200 if there were three
calls from 555-0011 to 555-8888 and two calls from
555-8888 to 555-0011, two calls from 555-2222 to
555-0091, two calls from 555-1221 to each of the
other numbers, and one call from 555-1333 to each of
555-0011, 555-1221, and 555-1200.
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