- #1
coldcell
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1. Ten trees - four pines, four cedars, and two spruce- are planted in two parallel rows of five trees. How many arrangements are possible if each row must have the same composition of trees, not necessarily in the same order.
2. Suppose we want to creat subsets of the ten digits {0, 1, 2, ..., 9}
a) How many subsets can be created, including the empty set?
b) How many of the subsets contain only digits less than 7?
c) How many of the subsets contain 0 or 9?
2. Suppose we want to creat subsets of the ten digits {0, 1, 2, ..., 9}
a) How many subsets can be created, including the empty set?
b) How many of the subsets contain only digits less than 7?
c) How many of the subsets contain 0 or 9?