ICSE Board Practice

Class VI Class VII Class VIII Class IX Class X
ICSE Grade IX - Mean and Median of Ungrouped Data
Question 1
1.
    • If the mean of
    • 6
    • samples is
    • 27
      5
      6
    • ,
    • what is the new mean if
    • 7
    • is subtracted from each number.
  • 85
    4
  • 165
    8
  • 125
    6
  • 127
    6
  • 41
    2
Question 2
2.
    • Heights of 10 students are given below. Find the median.
    • Height (in cm)
      140
      145
      155
      159
      169
      No. of students
      2
      2
      1
      1
      4
  • 158
    cm
  • 156
    cm
  • 157
    cm
  • 159
    cm
  • 155
    cm
Question 3
3.
    • Rainfall of 14 days (in mm) are given below. Find the median rainfall.
      • 8
      • 10
      • 7
      • 8
      • 10
      • 13
      • 10
      • 11
      • 12
      • 11
      • 13
      • 13
      • 15
      • 8
  • 25
    2
    mm
  • 23
    2
    mm
  • 21
    2
    mm
  • 11
    mm
Question 4
4.
    • Given the mean of
    • 10
    • samples as
    • 12
      3
      5
    • ,
    • what is the mean if a sample value is
    • decreased
    • by
    • 11
    • ?
  • 45
    4
  • 12
  • 25
    2
  • 23
    2
  • 21
    2
Question 5
5.
    • Ages of 12 students (in years) are given below. Find the mean age.
      • 15
      • 12
      • 11
      • 12
      • 13
      • 15
      • 14
      • 13
      • 13
      • 12
      • 12
      • 14
  • 11
    years
  • 12
    years
  • 14
    years
  • 15
    years
  • 13
    years
Question 6
6.
    • Given the mean of
    • 10
    • samples as
    • 4
      1
      2
    • ,
    • what is the new mean if two samples
    • 10
    • and
    • 1
    • are added ?
  • 6
  • 22
    5
  • 16
    3
  • 14
    3
  • 4
Question 7
7.
    • The scores obtained by 14 students in a test are given below. Find the mean score.
      • 1
      • 5
      • 13
      • 6
      • 13
      • 15
      • 8
      • 15
      • 16
      • 15
      • 2
      • 17
      • 20
      • 7
  • 20
  • 15
  • 10
    13
    14
  • 13
  • 19
Question 8
8.
    • If the sum of the following frequency distribution is
    • 39
    • ,
    • find the value of 'x'.
    • Value
      Frequency
      5
      3
      6
      x
      7
      7
      8
      6
      9
      4
      10
      3
      11
      3
      12
      1
      13
      4
      14
      2
      15
      2
  • 5
  • 3
  • 6
  • 1
  • 4
Question 9
9.
Find the mean of first 10 whole numbers.
  • 7
    2
  • 17
    4
  • 5
  • 9
    2
  • 11
    2
Question 10
10.
    • Ages of 20 students are given below. Find the median.
    • Age (in years)
      10
      11
      12
      13
      14
      15
      No. of students
      4
      1
      4
      2
      3
      6
  • 15
    years
  • 14
    years
  • 13
    years
  • 11
    years
  • 12
    years