对于新GRE考试，跟大家分享一下关于新GRE数学四大复习重要考点： 新GRE数学考试复习重点一：Set A set is a collection of objects or things. Each object in a set a member or element of that set.Size of a set is the number of members in the set. Example: The set of even numbers between 2 and 10 is of size 5:{2,4,6,8,10}. The set of primes between 2 and 10 is of size 4:{2,3,5,7}. Remember: Each member of set A belongs to A or is in the set A. A set can not have repeating member:{1,3,1,2}is not a set. Rearranging the order of the members does not change the set:{1,2,3}is same as{3,2,1}. 新GRE数学考试复习重点二：Combinations Number of ways we can select n objects from a group of m distinct objects is m!/(n!*(m-n)!). Example: Number of possible ways to pick 4 oscar nominations from a list of 50 movies is 50!/(4!*(50-4)!)=50!/(4!*46!)=50*49*48*47/24=230300. Remember:

This does not apply if there are identical objects.

新GRE数学考试复习重点三：Permutation of Objects The number of ways n distinct objects can be ordered is n!. Example: Number of ways 6 people can from a queue is 6!. Number of ways 5 different cars can be parked in 5 parking spaces is 5!. Remember: This does not apply if there are identical objects or ordering does not matter. 新GRE数学考试复习重点四：Permutation with Selection The number of ways n objects drawn from a collection of m distinct objects can be ordered is m!/(m-n)!. Example: Number of ways a queue of length 3 can be formed from a group of 5 people is 5!/(5-3)!=5!/2!=5*4*3=60. Number of possible top ten list for 150 movies is 150!/(150-10)!. Remember: This does not apply if there are identical objects or ordering does not matter. 以上就是跟大家分享的关于新GRE数学考试的复习重点四要点，希望对大家有所帮助！最后预祝大家在GRE考试中取得佳绩！