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COMBINATORICS ONLINE SESSION
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8/9/09 2:00pm - 3:30pm EST
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Permutations and Combinations: Advanced Counting Methods
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Sign Up
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Registration is closed.
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Concepts Covered
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- The basic principles of counting
- Counting factors for a number
- Arranging(permutating) objects with/without restrictions
- Combinations with/without restrictions
- Advanced grouping
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Why You Need This Session
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If you want to break the 700 level, knowing how to attack difficult combinatorics problems is a must. You will get at least one combinatorics in the GMAT quantitative section if you are performing at the 600-700 level.
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Example Problem
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If x, y, and z are positive integers, and x + y + z = 9. How many combinations of x, y, and z are possible?
(A) 15
(B) 28
(C) 30
(D) 55
(E) 72
Answer: B (Highlight the black box to reveal the answer.)
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