A. 1 B. 2 C. 3 D. 5 E. 6 相关知识点: 试题来源: 解析 D 翻译:从集合{1,2,3,4,5,6,7,8,9,10,11}中去掉两个数,使得剩下所有数字的平均数是6,一共有( )多少种方法? 11个数中去掉两个数剩下9个数,平均数是6,总和6×9=54,原总和是1+2+⋯+11=66,所以66−54=12,12是去掉...
In probability theory, subsets are used to count favorable outcomes and calculate probabilities. The number of subsets with a specific number of elements determines the likelihood of obtaining a particular combination from a larger set. Answer and Explanation:1 ...
【题目】How many subsets containing three different number s can be selected from the set {89,95,99,132,166,173}so that the sum of the three numbers is even?(). A.6 B.8 C.10 D.12 E.24 相关知识点: 试题来源: 解析 【解析】D ...
How many subsets of an odd number of elements does a set with15elements have? Number of Subsets and Number of Combinations: The total number of subsets of a set withnelements is2n.To see why this is true, we observe that the number of subsets is equal to the numb...
The subsets of the set {w, x, y} are {w}, {x}, {y}, {w,x}, {w,y}, {x,y}, {w,x,y}, and { } (the empty subset). How many subsets of the set {w,x,y,z} containw? 选项: A、Four B、Five C、Seven D、Eight ...
How many subsets of two elements can be removed from the set {1,2,3,4,5,6,7,8,9,10,11} so that the mean (average)of the remaining numbers is ?( ). A. 1 B. 2 C. 3 D. 5 E. 6 相关知识点: 试题来源: 解析 D 有多少个二元子集,使之从{1,2,3,4,5,6,7,8,9,10,...
Let S be a set containing n elements. Show that S has 2n subsets. How many different relations are there on a set with n elements if (a) n = 1. (b) n = 2. (c) n = 3. How many anti-symmetric relations on the set A = {1,2,3,4,5,6} contain the order...
How many subsets containing three different numbers can be selected from the set {89,95,99,132,166,173} so that the sum of the three numbers is even?( ).A.6B.8C.10D.12E.24 答案 D从集合{89,95,99,132,166,173}中可以选择多少个包含三个不同数字的子集,使这三个数字的和是偶数?要得到...
If a set has 1,024 subsets, how many elements does it have? Given that the set A = (5, 6, 7, 8, 9), how many subsets of A contain at least 2 elements? How many subsets in a set with n elements have n elements? How many subsets of the set {1, 2, 3, 4, 5, 6, 7,...
How many elements are in the intersection of sets A' and B? How many sets of three numbers are there from a set of n numbers? How many 4-element subsets of the set S = \{1,2,3...,10\} contain no consecutive integers? How many relations are there...