1) Choosing a subset of a set is an example of ___. a) combination b) integration c) differentiation d) permutation 2) Which of the following situations or activities involve permutation? a) matching shirts and pants b) forming different triangles out of 5 points on a plane, no three of which are collinear c) assigning telephone numbers to subscribers d) forming a committee from the members of a club 3) The product of a positive integer n and all the positive integers less than it is _______, a) powers of n b) multiples of n c) n - factors d) n factorial 4) Two different arrangements of objects where some of them are identical are called _________. a) distinguishable permutations b) unique combinations c) circular permutations d) circular combinations 5) How many different 4-digit even numbers can be formed from the digits 1, 3, 5, 6, 8, and 9 if no repetition of digits is allowed? a) 1,680 b) 840 c) 420 d) 120 6) In how many ways can 8 people be seated around a circular table if two of them insist on sitting beside each other? a) 360 b) 720 c) 1440 d) 5040 7) Find the number of distinguishable permutations of the letters of the word PASS. a) 4 b) 12 c) 36 d) 144 8) If P(9, r) = 3024, what is r ? a) 2 b) 4 c) 5 d) 6 9) If a combination lock must contain 5 different digits, in how many ways can a code be formed from the digits 0 to 9? a) 15,120 b) 30,240 c) 151,200 d) 1,000,000 10) Which of the following situations does NOT illustrate combination? a) Selecting 2 songs from 10 choices for an audition piece b) Fixing the schedule of a group of students who must take exactly 8 subjects c) Enumerating the subsets of a set d) dentifying the lines formed by connecting some given points on a plane

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