sat數學概率論常用解題技巧

　　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：

　　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：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?

　　If p, r, m are three different prime numbers greater than 2, and n=pr m, how many positive factors, including 1 and n, does n have?

　　比較題目：If p, r, m, n, t and s are six different prime numbers greater than 2, and n=prsmnt, how many positive factors, including 1 and n, does n have?

　　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/b1?

　　比較題目：If someone throws a dice twice, what is the probability that the point he gets on one throw is bigger than the other?