Q.3.2 Determine each individual student's average % mark, by taking the average of the student's % marks for each of the three tests. Use an appropriate formula in cells H2 to H9. Q.3.3 Determine the average % mark obtained by all students for the Maths test. Use an appropriate formula in cel| 111. Q.3.4 Determine the average % mark obtained by all students for the Science test. Use an appropriate formula in cell 12.
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.
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