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In a class of 36 students Ravi's rank from the top is 12. Radhika ranks three places above Ravi. What is Radhika's rank from the bottom? 1) 27 2) 28 3) 26 4) 29 5) None of these

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The number of students in 3 classes are in the ratio 2:3:4. If 12 students are increased in each class, this ratio changes to 8:11:14. The total number of students in the three classes in the beginning was

There are 5 students in class 10, 6 students in class 11 and 8 students in class 12. If the number of ways, in which 10 students can be selected from them so as to include at least 2 students from each class and at most 5 students from the total 11 students of class 10 and 11 is 100 k, then k is equal to _______.