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.
    • Wages of 15 labourers are given below. Find the mean.
    • Wage (in rupees)
      322
      356
      374
      436
      472
      473
      No. of labourers
      1
      2
      4
      3
      4
      1
  • ₹
    413.27
  • ₹
    413.40
  • ₹
    413.33
  • ₹
    414.27
  • ₹
    415.27
Question 2
2.
    • If the mean of
    • 5
    • samples is
    • 29
      3
      5
    • ,
    • what is the new mean if each number is multiplied by
    • 7
    • .
  • 1034
    5
  • 1450
    7
  • 1036
    5
  • 1038
    5
  • 622
    3
Question 3
3.
    • The mean of
    • 7
    • numbers is
    • 8
    • .
    • Upon
    • adding
    • one number,
    • the mean becomes
    • 8
      1
      8
    • .
    • Find the
    • included
    • number.
  • 8
  • 6
  • 11
  • 9
  • 10
Question 4
4.
    • The marks obtained by 14 students in a test are given below. Find their mean marks.
      • 15
      • 2
      • 2
      • 20
      • 38
      • 13
      • 14
      • 36
      • 27
      • 13
      • 4
      • 20
      • 37
      • 40
  • 281
    14
  • 279
    14
  • 241
    12
  • 321
    16
  • 283
    14
Question 5
5.
    • Rainfall of 15 days are given below. Find the median.
    • Rainfall (in mm)
      5
      6
      7
      8
      9
      10
      11
      14
      No. of days
      1
      1
      1
      2
      2
      4
      2
      2
  • 12
    mm
  • 10
    mm
  • 9
    mm
  • 11
    mm
  • 8
    mm
Question 6
6.
    • Temperatures of 15 days are given below. Find the mean.
    • Temperature (in degree C)
      26
      27
      28
      29
      31
      32
      33
      34
      35
      No. of days
      1
      2
      1
      1
      1
      2
      2
      3
      2
  • 97
    3
    °C
  • 32
    °C
  • 94
    3
    °C
  • 95
    3
    °C
  • 100
    3
    °C
Question 7
7.
    • Rainfall of 30 days are given below. Find the mean.
    • Rainfall (in mm)
      5
      6
      7
      8
      9
      10
      11
      12
      14
      15
      No. of days
      3
      2
      4
      4
      1
      3
      3
      2
      4
      4
  • 329
    30
    mm
  • 359
    30
    mm
  • 10
    mm
  • 299
    30
    mm
  • 301
    30
    mm
Question 8
8.
    • The marks obtained by 10 students in a test are given below. Find the mean of their marks when the marks of each student is decreased by 7.
      • 1
      • 26
      • 17
      • 24
      • 29
      • 10
      • 43
      • 35
      • 21
      • 14
  • 13
  • 16
  • 14
  • 15
  • 17
Question 9
9.
    • Given the mean of
    • 10
    • samples as
    • 5
      2
      5
    • ,
    • what is the new mean if two samples
    • 9
    • and
    • 4
    • are added ?
  • 11
    2
  • 57
    10
  • 67
    12
  • 23
    4
  • 65
    12
Question 10
10.
    • Scores of 11 students are given below. Find the median score.
      • 82
      • 84
      • 82
      • 88
      • 84
      • 71
      • 90
      • 83
      • 72
      • 75
      • 73
  • 83
  • 82
  • 84
  • 80
  • 81