The graph illustrates a normal distribution for the prices paid for a particular model of HD television. The mean price paid is $1200 and the standard deviation is $110. 870 980 1090 1200 1310 1420 1530 Distribution of Prices What is the approximate percentage of buyers who paid between $1090 and $1310? What is the approximate percentage of buyers who paid between $1090 and Ş1200? What is the approximate percentage of buyers who paid less than $870? What is the approximate percentage of buyers who paid between $980 and $1200? What is the apPproximate percentage of buyers who paid between $870 and $1200? 96 What is the approximate percentage of buyers who paid more than $1420?

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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.