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General Mathematics Paper 2,May/June. 2009  
Questions: 1 2 3 4 5 6 7 8 9 10 11 12 13 Main
General Comments
Weakness/Remedies
Strength








Question 8

The marks scored by 50 students in a Geography examination are as
follows:

60      50      40      67      53      73      37      55      62      43
44      69      39      32      45      58      48      67      39      51
46      59      40      52      61      48      23      60      59      47
65      58      74      47      40      59      68      51      50      50
71      51      26      36      38      70      46      40      51      42

(a)      Using class intervals 21 – 30, 31 – 40…, prepare a frequency
          distribution table.

(b)     Calculate the mean mark of the distribution.

(c)      What percentage of the students scored more than 60%?
_____________________________________________________________________________________________________
Observation
 

This question was attempted by many candidates and they scored high marks in it. However, some of the candidates could not get the percentage number of candidates who scored more than 60 marks.  A few others drew histogram that was not required.

Class I interval

Class mark (x)

Tally

Frequency (f)

Fx

21-30

25.5

11

2

  51

31-40

35.5

1111  1111

10

355

41-50

45.5

1111 1111 11

12

546

51-60

55.5

1111 1111 1111

15

  832.5

61-70

65.5

1111 111

8

524

71-80

75.5

111

3

  226.5

 

         50

2535

  
Mean =  =  =50.7. The percentage number of students who scored more than 60 marks = 11/50 x 100 = 22%.

             

 

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