From the set of 6 letter A,B,C,D,E,and F,there are 20 different 3

您还没有登录，登录以后才可以查看答疑和进行提问。

From the set of 6 letter A,B,C,D,E,and F,there are 20 different 3-letter subsets that could be selected.

The number of 3-letter subsets that include the letter F

答案：C

5
评分

5
浏览

老师你好，这题我没看懂，3letter排列组合出来不是5x4x3=60吗，请问解题思路是什么呢

Sentence Equivalence
The performers walking the tightrope high above th......
Quantitative Comparison
Quantity AThe area of a trapezoid with bases of 10......
Problem Solving
If$$\frac{15!}{3^m}$$is an integer, what is the gr......
Sentence Equivalence
Though Edmurd certainly had a dignified bearing an......
Text Completion
The motives of many major investors in Pop Art hav......
Reading Comprehension
It can be inferred from the passage that much of t......
Quantitative Comparison
x>0 and $$x^4$$ =625 Quantity A:The greatest prim......
Numeric Entry
The average (arithmetic mean) of the 11 numbers in......