Starting at a fixed time, each car entering an intersection is observed tosee whether it turns left (1), right (R). or goes straight ahead (A). Theexperiment terminates as soon as a car is observed to turn left. Let X= the number of cars observed. What are possible Xvalues? List fiveoutcomes and their associated Xvalues.
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.
Starting at a fixed time, each car entering an intersection is observed to
see whether it turns left (1), right (R). or goes straight ahead (A). The
experiment terminates as soon as a car is observed to turn left. Let X= the number of cars observed. What are possible Xvalues? List five
outcomes and their associated Xvalues.
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