GRE

AB + CD

The circumference of the circle with center O

The area of sector OABC

9

The number of possible assignments such that a woman is president and a man is vice president

The number of possible assignments such that both the president and vice president positions are filled by women

30

The number of students taking neither gym nor a foreign language

The number of assign?ments of chefs to meals if each chef must cook a different meal

The number of assign?ments of chefs to meals if each chef may cook any of the three meals

Q

75

The number of ingre?dients that must be used to get the smallest possible number of different ?combinations

The number of ingredients that must be used to get the largest possible number of different combinations

25000 +道题目

5本备考书籍