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The average mark obtained by 15 students was 10 and the average mark obtained by 10 students was 15. What was the average mark obtained by all students?

Correct Answer: 12
Total mark of first 15 students = 15 * 10 = 150 Total mark of first 10 students = 15 * 10 = 150 Total mark of 25 students = 150 + 150 = 300 Average = 300 / 25 = 12

The average mark obtained by 10 students was 6 and the average mark obtained by 6 other students was 10. What was the average mark obtained by all 16 students?

The average mark obtained by 10 students was 6 and the average mark obtained by 6 students was 10. What is the average mark obtained by all 16 students ?

The average mark obtain by 15 students was 10 and the average mark obtained by 10 students was 15. What was the average mark obtined by all students?

In a class of 60 students, 20 students like Math, 25 students like English and 30 students like Science. If 5 Students like both Math and Science, 8 Students like both English and Science and 3 students like neither of these subjects, how many students like all of the three subjects?

Students of three different classes appeared in common examination. Pass average of 10 students of first class was 70%, pass average of 15 students of second class was 60% and pass average of 25 students of third class was 80% then what will be the pass average of all students of three classes?

In a class, 120 students are male and 100 students are female. 25% of male students and 20% of female students are engineering students. 20% of the male engineering students and 25% of the female engineering students passed the final exam. What percentage of engineering students passed the exam?

In a class, 120 students are male and 100 students are female. 25% of the male students and 20% of the female students are engineering students. 20% of the male engineering students and 25% of the female engineering students passed the final exam. What percentage of engineering students passed the exam?

In a class, 120 students are male and 100 students are female , 25% of the male students and 20% of the female students are engineering students . 20% of the male engineering students and 25% of the female engineering students passed the final exam. What percentage of engineering students passed the exam ?

In a primary school the average weight of male students is 65.9 kg and the average weight of female students is 57 kg. If the average weight of all the students ( both male and female ) is 60.3 kg and the number of male students in the school is 66, what is the number of female students in the school?

In an examination, the percentage of students qualified to the number of students appeared from school A is 70%. In school B, the number of students appeared is 20% more than the students appeared from school A and the number of students qualified from school B is 50% more than the students qualified from school A. What is the percentage of students qualified to the number of students appeared from school B ?