1. The total area under the standard normal curve is В. О А. -1 C. 0.5 D. 1 2. What is the shape of a Normal Probability Distributions? B. bell A. bar C. circle D. line 3. Which part of a normal curve is extended indefinitely both directions along the horizontal axis, approaching but never touching it? C. top A. center B. tail D. spread 4. Which of the following rule states that almost all data fall within the 1, 2 and 3 of standard deviation of mean when the population is normally distributed? A. Empirical rule R. Pascal's triangle rule C. Lottery rule D. Sampling rule

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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.