ANÁLISE COMBINATÓRIA - QUESTÕES ENEM E VESTIBULARES

Subscribe to the channel, activate the bell, and ask me your questions! =D Combinatorial Analysis Playlist:    • ANÁLISE COMBINATÓRIA   ENEM Questions Playlist:    • ENEM   PDF Sheet: https://drive.google.com/file/d/10mEO... Combinatorial Analysis - ENEM and University Entrance Exams 1. Consider the set A = {1, 2, 3, 4}. 1. Let m be the number of all simple permutations that can be made with the elements of A, and let n be the number of all subsets of A. Then: a) m is less than n b) m is greater than n c) m = n + 1 d) m = n + 2 e) m = n + 3 2. Given A = {2, 3, 5, 6, 9, 13} and B = {a^b, a ∈ A, b ∈ A and a ≠ b}, the number of even elements of B is: a) 5 b) 8 c) 10 d) 12 e) 13 3. Three points are marked on a line r and four points on another line parallel to r. The number of triangles that exist with vertices at these points is: a) 60 b) 35 c) 30 d) 9 e) 7 4. Three companies must be hired to perform four distinct jobs in a condominium. Each job will be assigned to a single company, and all of them must be hired. In how many distinct ways can the jobs be distributed? a) 12 b) 18 c) 36 d) 72 e) 108 5. Fifteen girls are positioned on a sports court for a gymnastics presentation, such that no three are in a straight line, except for the girls who have a letter printed on their shirts and are aligned forming the word AEROBICS. The number of lines determined by the positions of the fifteen girls is... a) 30 b) 57 c) 78 d) 105 e) 210