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gmat 数学与词汇复习资料（GMAT mathematical and vocabulary review materials）.doc

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gmat 数学与词汇复习资料（GMAT mathematical and vocabulary review materials）

gmat 数学与词汇复习资料（GMAT mathematical and vocabulary review materials） The math test assembly and answer 1 Permutations, combinations, and probabilities Of the 1 and 10 men, 6 were males, and the number of combinations of 3 men and 1 women was 4. Basic combinatorial questions: C63 C41 2, there are 4 pairs of people, take 3 people, form a group, can not take 2 from any pair, ask how many possibilities? C83 -C41 C61 first gets all the combinations, and then subtracts the paired ones, 3, 15, take 5 people, there are 3 can not be taken, how many kinds of law? C155 -C122 How many possibilities are there in front of B in the 4 and 7 player races, A? P77 / 2 A is equal to the number of times before B 5, 3 of people are divided into A, B, C three groups, group and group of people to consider, how many points? P33 * (P22) 3 consider the group first, then consider the person Of the 6 and 17 individuals, 3 were placed in 3 houses, of which 7 were in only two rooms, and the other 10 were in another house. How many points were there? P72 P101 7, A, B, C, C, D, E, F, ranked 1, 2, 3, 4, 3, 5, 6 of these six positions, ask A not in 1, B not in 2, and not in the number of permutations of two P66 -3P55 +3P44 -P33 (the first number, respectively put A 1, B 2, C 3, the number of calculated from the total number can be subtracted, with three the same ring interleaving methods for calculating the total number of) 8, 4 pieces of different sizes, two of maximal amplitude together, how much one? 2P33 9, 5 cars in a row, 1 yellow 1, blue two, 3 red, 3 red car and can not be resolved, how many kinds of method? P55 /P33, if you add one more condition, 2 distinguishable white cars, the same way: P77, /P33, P22 10, 6 people in different heights are divided into 2 rows, 3 people in each row, each row from left to right, from low to high, and the back of people than him in front of people, how many kinds of method? 5 kinds. Exhaust. 6 people, 1, 2, 3, 4, 5, 6, that is One Five Six 1, 5, 6, 2, three fix