Question
A university has Y students. 40% study science, 35%
study arts, and the rest study commerce. In an exam, 25% of science students, 20% of arts students, and 40% of commerce students passed. If 1095 students failed the exam, how many total students (Y) are in the university?Solution
Total number of students in University = Y Students in science department = 40% of Y = 0.4Y Students in art department = 35% of Y = 0.35Y Students in commerce department = 25% of Y = 0.25Y Total number of pass students = 25% of 0.4Y + 20% of 0.35Y + 40% of 0.25Y Y-1095 = 0.1Y + 0.07Y + 0.1Y Y-1095 = 0.27Y 0.73Y = 1095 Y = 1500
456, 460, 444, 508, 252, ?
24, 35, 57, 90, 134, ?
1 12 31 58 93 ?
30          162        344        ?             890        1270
...150 Â Â Â 15Â Â Â 3Â Â Â ? Â Â Â Â 0.36Â Â Â Â 0.18
8      27       64      125     ?       343Â
...1, 26, 75, 156, 277, ?
What will come in place of the question mark (?) in the following series?
4000, ?, 320, 192, 153.6, 153.6
What will come in place of the question mark (?) in the following series?
100, 81, 64, 51, 40, ?
321, 240, ?, 105, 51, 6
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