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By Arithmetic Mcqs 9 Comments

If the average marks of three batches of 55, 60 and 45 students respectively is 50, 55, 60, then the average marks of all the students is:

A. 53.33
B. 54.68
C. 55
D. None of these

55 students get average marks of 55%.
so 55*50=2750
similarly 60*55=3300
& 60*45=2700
now total no of marks obtain by all students of three batches= 2750+3300+2700=8750/=
Total no of students= 55+60+45=160.
By dividing total marks on each student , we get average marks obtain by each student
so 8750/160 = 54.68

Solution Added by: MUHAMMAD SHOAIB

Related Mcqs:

  1. If the average marks of three batches of 55, 60 and 45 students respectively is 50, 55, 60, then the average marks of all the students is__________?

    A. 53.33
    B. 54.68
    C. 55
    D. None of these

  2. 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

  3. 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

  4. A student scored an average of 80 marks in 3 subjects: Physics, Chemistry and Mathematics. If the average marks in Physics and Mathematics is 90 and that in Physics and Chemistry is 70, what are the marks in Physics?

    A. 60
    B. 64
    C. 72
    D. 80

  5. In an examination a pupil’s average marks were 63 per paper. If he had obtained 20 more marks for his Geography paper and 2 more marks for his History paper, his average per paper would have been 65. How many papers were there in the examination?

    A. 8
    B. 9
    C. 10
    D. 11

  6. 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

  7. 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

  8. The average of the marks of 12 students in a class is 36. If the marks of each student are doubled, find the new average?

    A. 72
    B. 45
    C. 37
    D. 79

  9. The total marks obtained by a student in Mathematics and Physics is 60 and his score in Chemistry is 20 marks more than that in Physics. Find the average marks scored in Mathematics and Chemistry together.

    A. 40
    B. 30
    C. 25
    D. Data inadequate

  10. 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

The correct answer to the question: "If the average marks of three batches of 55, 60 and 45 students respectively is 50, 55, 60, then the average marks of all the students is:" is "54.68".

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9 Comments

    • MUHAMMAD SHOAIB on

      55 students get average marks of 55%.
      so 55*50=2750
      similarly 60*55=3300
      & 60*45=2700
      now total no of marks obtain by all students of three batches= 2750+3300+2700=8750/=
      Total no of students= 55+60+45=160.
      By dividing total marks on each student , we get average marks obtain by each student
      so 8750/160=54.68

      Reply
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