Study The Frequency Polygon


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Study The Frequency Polygon

The marks obtained by 273 examinees is shown by the frequency polygon. Give that mean marks is 59.5. Study the frequency polygon and answer O. Nos 1 to 4

1. The number of examinees getting more than average marks is

  1. 72
  2. 105
  3. 152
  4. 164

2. Percentage of the students who got above 80% marks is

  1. 9.81
  2. 10.53
  3. 11.28
  4. 11.72

3. Percentage of the students got marks above 60% and below 80% is

  1. 43.95
  2. 48.39
  3. 51.06
  4. 56.84

4. If 40 is the pass marks, percentage of students failed is…………..

  1. 14.56
  2. 15.84
  3. 16.11
  4. 17.25
Anurag Mishra Professor Asked on 20th July 2015 in Maths.
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    1. Answer: (3) 152
    Explanation:-
    The average marks of examiners = 59.5
    The number of examiners who more than the average marks = 72 + 48 + 24 + 8 = 152
    Hence, the answer is (3) 152.

    2. Answer :  (4) 11.72 %
    Explanation:-
    The total number of students = 2 + 4 + 12 + 26 + 35  + 42 + 72 + 48 + 24 + 8 = 273
    The number of students who got above 80% marks = 24 + 8 = 32
    Percentage of the students who got above 80% marks = 32 x 100/273 = 11.72 %
    Hence, the answer is (4) 11.72% .

    3. Answer: (1) 43.95%
    Explanation:-
    The total number of students = 2 + 4 + 12 + 26 + 35  + 42 + 72 + 48 + 24 + 8 = 273
    The number of students who got above 60 % and below 80% = 72  + 48 = 120
    Percentage of the students got marks above 60% and below 80% = 120 x 100/273
    =43.95%
    Hence, the answer is (1) 43.95%.

    4. Answer: (3) 16.11 %
    Explanation:-
    The number of students who got below 40 marks = 2 + 4 + 12 + 26 = 44
    Percentage of students failed = 44 x 100/273 = 16.11 %
    Hence, the answer is (3) 16.11 %.

    Anurag Mishra Professor Answered on 20th July 2015.
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