Tham khảo tài liệu 'wiley the official guide for gmat episode 1 part 8', ngoại ngữ, ngữ pháp tiếng anh phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Data Sufficiency Sample Questions 70. Mary persuaded n friends to donate 500 each to her election campaign and then each of these n friends persuaded n more people to donate 500 each to Mary s campaign. If no one donated more than once and if there were no other donations what was the value of n 1 The first n people donated 116 of the total amount donated. 2 The total amount donated was 120 000. 71. Carlotta can drive from her home to her office by one of two possible routes. If she must also return by one of these routes what is the distance of the shorter route 1 When she drives from her home to her office by the shorter route and returns by the longer route she drives a total of 42 kilometers. 2 When she drives both ways from her home to her office and back by the longer route she drives a total of 46 kilometers. 72. Is x y 1 x y 2 2 2 y- 1 73. If m is an integer is m odd 1 mm is not an even integer. 2 m - 3 is an even integer. B D A C 74. What is the area of triangular region A BC above 1 The product of BD and AC is 20. 2 x 45 75. In th e xy-plane the line with equation ax by c 0 2 where abc 0 has slope 3. What is the value of b 76. If m p and t are positive integers and m p t is the product mpt an even integer 1 t - p p - m 2 t - m 16 77. Each week a certain salesman is paid a fixed amount equal to 300 plus a commission equal to 5 percent of the amount of his sales that week over 1 000. What is the total amount the salesman was paid last week 1 The total amount the salesman was paid last week is equal to 10 percent of the amount of his sales last week. 2 The salesman s sales last week totaled 5 000. 78. A total of 60 000 was invested for one year. Part of this amount earned simple annual interest at the rate of x percent per year and the rest earned simple annual interest at the rate of y percent per year. If the total interest earned by the 60 000 for that year was 4 080 what is the value of x 3y 1 x y 2 The ratio of the amount that earned interest at the
