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.
    • Weights of 20 students are given below. Find the mean.
    • Weight (in kg)
      40
      42
      45
      48
      49
      57
      60
      No. of students
      3
      1
      2
      4
      3
      1
      6
  • 254
    5
    kg
  • 257
    5
    kg
  • 262
    5
    kg
  • 253
    5
    kg
  • 252
    5
    kg
Question 2
2.
    • The mean of
    • 10
    • numbers is
    • 12
      1
      5
    • .
    • Upon
    • adding
    • one number,
    • the mean becomes
    • 11
      3
      11
    • .
    • Find the
    • included
    • number.
  • -1
  • 3
  • 5
  • 1
  • 2
Question 3
3.
    • Weights of 12 students (in kg) are given below. Find the median weight.
      • 55
      • 58
      • 54
      • 47
      • 48
      • 57
      • 54
      • 59
      • 44
      • 48
      • 51
      • 46
  • 53
    kg
  • 107
    2
    kg
  • 105
    2
    kg
  • 109
    2
    kg
Question 4
4.
    • Ages of 20 students are given below. Find the mean.
    • Age (in years)
      10
      11
      12
      13
      14
      15
      No. of students
      4
      1
      3
      4
      1
      7
  • 149
    10
    years
  • 129
    10
    years
  • 13
    years
  • 139
    10
    years
  • 131
    10
    years
Question 5
5.
Find the mean of all prime numbers between 30 and 60.
  • 313
    7
  • 133
    3
  • 223
    5
  • 311
    7
  • 309
    7
Question 6
6.
Find the mean of all prime numbers between 50 and 100.
  • 220
    3
  • 366
    5
  • 512
    7
  • 364
    5
  • 368
    5
Question 7
7.
    • The mean of
    • 7
    • numbers is
    • 11
      2
      7
    • .
    • Upon
    • excluding
    • one number,
    • the mean becomes
    • 11
      5
      6
    • .
    • Find the
    • excluded
    • number.
  • 6
  • 8
  • 10
  • 7
  • 9
Question 8
8.
Find the median of all the factors of 40.
  • 11
    2
  • 7
  • 15
    2
  • 13
    2
  • 25
    4
Question 9
9.
Find the median of all the factors of 10.
  • 4
  • 7
    2
  • 13
    4
  • 5
    2
  • 9
    2
Question 10
10.
    • Scores of 30 students are given below. Find the mean.
    • Score
      70
      72
      76
      77
      78
      80
      82
      84
      85
      89
      90
      No. of students
      2
      3
      2
      1
      4
      1
      2
      4
      4
      1
      6
  • 1238
    15
  • 1253
    15
  • 408
    5
  • 245
    3
  • 1223
    15