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There are 5 brilliant students in class XI and 8 brilliant students in class XlIl.Each class has 50 students.The odds in favour of choosing the class XI are 2:3. One of the classes is chosen randomly and then a student is randomly selected.Find the probability of selecting a brilliant student.

The number of ways of distributing 50 identical things among 8 persons in such a way that three of them get 8 things each,two of them get 7 things each and remaining 3 get 4 things each,is equal to

In a class room the ratio of number of girls to that of boys is 3:4 . The average height of students in the class is 4.6feet. If the average height of the boys in the class is 4.8 feet, then what is the average height of the girls in the class?

The average age of students of a class is 15.8 years. The average age of boys in the class is 16.4 years and that of the girls is 15.4 years. The ratio of the number of boys to the number of girls in the class is (a) 1 : 2 (b) 2 : 3 (c) 3 : 4 (d) 3 : 5

Winners Announcement 8 Sep 2020 | Day -17 | Doubtnut Live Class Daily Quiz Contest | Leaderboard

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