Rakesh is classifying flags of the world according to the presence of red or blue in them.
Which flag would be in the same category as that of South Korea?
Given the sets what is
Details and assumptions
denotes the number of members of the set
Let be a subset of the set such that and are elements in but and are not. If there are a total of such subsets , what is the value of
In counting the numbers from 1 to 99 (inclusive), what is the total number of times that the digit 3 is used?
Details and assumptions
The number uses the digit 1 once and the digit 2 once.
The number uses the digit 1 three times.
Given the set let and be two subsets of How many sets are there such that
Details and assumptions
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