The arithmetic mean of the scores of a group of students in a test was 52. The brightest 20% of them secured a mean score of 80 and the dullest 25% a mean score of 31. The mean score of remaining 55% is___________?

Related Mcqs:

1. The average mark of the students of a class in a particular exam is 80. If 5 students whose average mark in that exam is 40 are excluded, the average mark of the remaining will be 90. Find the number of students who wrote the exam.

   A. 20
   B. 15
   C. 25
   D. 35

2. The average of 35 students in a class is 16 years. The average age of 21 students is 14. What is the average age of remaining 14 students?

   A. 15 years
   B. 17 years
   C. 18 years
   D. 19 years

3. If the arithmetic mean of seventy five numbers is calculated, it is 35. If each number is increased by 5, then mean of new number is___________?

   A. 30
   B. 40
   C. 70
   D. 90

4. In a test a candidate attempted only 8 Questions and secured 50% marks in each of the questions if the obtained a total of 40% in the test and all questions in the test carried equal marks, how many questions were there in the test?

   A. 8
   B. 10
   C. 15
   D. 16

5. The average marks in mathematics scored by the students of a school at the public examination were 39. If four of these students who actually scored 5, 12, 15 and 19 marks at the examination had not been sent up, the average marks for the school would have been 44. Find the number of students sent up for examination from the school?

   A. 20
   B. 25
   C. 30
   D. 32

6. The average marks of a class of 30 students is 40 and that of another class of 50 students is 60. Find the average marks of all the students?

   A. 50
   B. 47.5
   C. 59
   D. 52.5

7. The average age of 15 students of a class is 15 years. Out of these, the average age of 5 students is 14 years and that of the other 9 students is 16 years. The age of the 15th student is____________?

   A. 11 years
   B. 14 years
   C. 15 years
   D. 15 2/7 years

8. In a class of 140 students, 60% of them passed. By what percent is the number of students who passed more than the number of failed students?

   A. 80%
   B. 20%
   C. 40%
   D. 50%
   E. None of these

9. In a school, 40 % of the students play football and 50 % play cricket. If 18 % of the students play neither football nor cricket, the percentage of students playing both is________?

   A. 40 %
   B. 32 %
   C. 22 %
   D. 8 %

10. Out of 100 students, 50 failed in English and 30 in Mathematics. If 12 students fail in both English and Mathematics. Then the number of students who passed in both the subjects is__________?

    A. 26
    B. 28
    C. 30
    D. 32