各位考生一定要注意,對SAT數學概率論部分來說,你用的方法越簡單,你做對的概率越大,而且還可以在考場上省出很多時間來做更有意義的事情。下面我們就對SAT數學概率論部分的常用解題技巧進行總結,以期事半功倍:
(1)In the integer 3589 the digits are all different and increase from left to right. How many integers between 4000 and 5000 have digits that are all different and that increased from left to right?
比較題目:(2)In the integer 3589 the digits are all different and increase from left to right. How many integers between 30000 and 50000 have digits that are all different and that increased from left to right?
(3)If p, r, m are three different prime numbers greater than 2, and n=p*r* m, how many positive factors, including 1 and n, does n have?
比較題目:(4)If p, r, m, n, t and s are six different prime numbers greater than 2, and n=p*r*s*m*n*t, how many positive factors, including 1 and n, does n have?
(5)If someone throws a dice twice, on the first time he gets a points, and on the second he gets b points, what is the probability a/b>1?
比較題目:(6)If someone throws a dice twice, what is the probability that the point he gets on one throw is bigger than the other?
(7)Mr. Jones must choose 4 of the following 5 flavors of jellybean: apple, berry, coconut, kumquat, and lemon, How many different combinations of flavors can Mr. Jones choose?
中國學生在SAT數學概率論部分不能得到滿分的原因除了英文環境下題目理解錯誤之外,還有一點就是國內高中學到的解題技巧都沒有積極應用,所以導致了解題繁瑣,不但浪費了時間,而且還使得答案錯誤。總之,做SAT數學概率論部分在讀懂題目的基礎上,一定要使用簡單的方法來做!