b) Best Homes Ltd. has 100 lots on which to build new houses. Two styles of houses are to be built, Modcl A and Model B. Better Homes wants to build these houses over the next nine months. During this time, Better Homes will have available 12 000 man-hours of carpentry labour and 13 000 man-hours of mason labour Each Model A house requires 200 man-hours of carpentry labour and 50 man-hours of mason labour, Each Model B house requires 100 man-hours of carpentry labour and 120 man-hours of mason labour The profit contribution of a Model A house is projected to be $5,100, while that of a Model B house is projected at $5,000. Better Homes wants to know how many houses of each type to build so as to maximize profit.
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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