Tuesday, July 19, 2011

There are eight examinations, 6 different subjects, 2 math, how many ways if math tests aren't consecutive?

At the end of the semester, Alice had to complete eight examinations. Six of them were in different subjects, but the other two were both mathematics exams. In how many ways could the examination timetable have been written given that the two mathematics exams were not consecutive? 4possible answers: 30,240; 35,280; 38,880; 9,360 - is this combinations? Permutations? How do you deal with the non-consecutive requirement for the 2 math tests?

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