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.
    • The scores obtained by 9 students in a test are given below. Find the mean score.
      • 16
      • 5
      • 9
      • 9
      • 12
      • 2
      • 5
      • 10
      • 19
  • 9
    2
    3
  • 5
  • 17
  • 19
  • 2
Question 2
2.
    • Heights of 30 students are given below. Find the mean.
    • Height (in cm)
      125
      129
      133
      138
      141
      159
      161
      168
      171
      172
      No. of students
      2
      1
      2
      4
      4
      6
      3
      2
      3
      3
  • 761
    5
    cm
  • 1531
    10
    cm
  • 1521
    10
    cm
  • 1541
    10
    cm
  • 1523
    10
    cm
Question 3
3.
    • Heights of 15 plants are given below. Find the mean.
    • Height (in cm)
      50
      60
      65
      77
      86
      93
      95
      No. of plants
      3
      2
      4
      2
      1
      1
      2
  • 361
    5
    cm
  • 356
    5
    cm
  • 352
    5
    cm
  • 353
    5
    cm
  • 351
    5
    cm
Question 4
4.
Find the median of the first 10 even numbers.
  • 10
  • 9
  • 12
  • 11
  • 13
Question 5
5.
    • Given the mean of
    • 9
    • samples as
    • 11
      1
      3
    • ,
    • what is the mean if a sample value is
    • decreased
    • by
    • 11
    • ?
  • 89
    9
  • 111
    11
  • 71
    7
  • 91
    9
  • 31
    3
Question 6
6.
Find the mean of first 8 whole numbers.
  • 4
  • 13
    4
  • 9
    2
  • 7
    2
  • 5
    2
Question 7
7.
    • Heights of 15 plants (in cm) are given below. Find the mean height.
      • 55
      • 56
      • 62
      • 62
      • 97
      • 92
      • 73
      • 92
      • 82
      • 51
      • 85
      • 52
      • 89
      • 85
      • 68
  • 367
    5
    cm
  • 369
    5
    cm
  • 377
    5
    cm
  • 372
    5
    cm
  • 368
    5
    cm
Question 8
8.
    • The mean of
    • 6
    • numbers is
    • 10
      1
      6
    • .
    • Upon
    • excluding
    • one number,
    • the mean becomes
    • 9
      1
      5
    • .
    • Find the
    • excluded
    • number.
  • 12
  • 16
  • 17
  • 14
  • 15
Question 9
9.
Find the mean of all prime numbers between 30 and 70.
  • 437
    9
  • 49
  • 535
    11
  • 439
    9
Question 10
10.
    • Heights of 10 students are given below. Find the median.
    • Height (in cm)
      126
      131
      140
      144
      160
      162
      No. of students
      2
      1
      2
      1
      2
      2
  • 143
    cm
  • 142
    cm
  • 144
    cm
  • 141
    cm
  • 140
    cm