ICSE Board Practice

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ICSE Grade IX - Mean and Median of Ungrouped Data
Question 1
1.
    • The marks obtained by 15 students in a test are given below. Find their median marks.
      • 18
      • 30
      • 28
      • 27
      • 34
      • 50
      • 45
      • 39
      • 7
      • 2
      • 9
      • 28
      • 16
      • 9
      • 16
  • 26
  • 28
  • 30
  • 25
  • 27
Question 2
2.
    • Given an even number of random samples with the middle two samples as
    • x +
    • 20
    • and x +
    • 20
    • and the median as
    • 23
    • ,
    • find the value of x.
  • 6
  • 3
  • 4
  • 0
  • 2
Question 3
3.
    • Scores of 11 students are given below. Find the median score.
      • 74
      • 80
      • 88
      • 76
      • 82
      • 79
      • 71
      • 78
      • 85
      • 80
      • 89
  • 81
  • 80
  • 82
  • 79
  • 78
Question 4
4.
    • If the mean of
      • 10
      • 7
      • 1
      • 6
    • x
      • 8
      • 3
      • 5
    • is
    • 5
      1
      4
    • ,
    • find the value of x.
  • 1
  • -1
  • 4
  • 3
  • 2
Question 5
5.
Find the mean of all prime numbers between 50 and 60.
  • 56
  • 55
  • 53
  • 57
  • 59
Question 6
6.
    • The scores obtained by 11 students in a test are given below. Find the mean score.
      • 5
      • 1
      • 1
      • 7
      • 6
      • 15
      • 14
      • 1
      • 18
      • 13
      • 17
  • 18
  • 8
    10
    11
  • 7
  • 17
  • 1
Question 7
7.
    • The mean of
    • 6
    • numbers is
    • 14
      2
      3
    • .
    • Upon
    • excluding
    • one number,
    • the mean becomes
    • 13
      3
      5
    • .
    • Find the
    • excluded
    • number.
  • 23
  • 21
  • 19
  • 17
  • 20
Question 8
8.
    • Temperatures of 30 days are given below. Find the mean.
    • Temperature (in degree C)
      27
      28
      29
      32
      33
      34
      35
      No. of days
      4
      4
      2
      4
      5
      6
      5
  • 32
    °C
  • 98
    3
    °C
  • 101
    3
    °C
  • 95
    3
    °C
  • 97
    3
    °C
Question 9
9.
Find the mean of the first 15 odd numbers.
  • 15
  • 13
  • 18
  • 14
  • 16
Question 10
10.
    • If the mean of the following frequency distribution is
    • 5
      8
      9
    • ,
    • find the value of 'x'.
    • Value
      Frequency
      2
      5
      3
      4
      4
      7
      5
      1
      6
      4
      7
      3
      8
      2
      9
      x
      10
      2
      11
      2
  • 6
  • 7
  • 4
  • 8
  • 5