3.The Grinch x-rays his heart. He says it is “down a size and a half”. If his heart measured 20cm, to begin with, what is the current measure? (Note: This is not accurate because he would be considered dead!)
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.
Given that Grinch X-rays his heart and says that his heart has gone down by a size and half.
If the heart measured 20cm in begin we need to find the current size of the heart.
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