CBSE Board Practice

Class VI Class VII Class VIII Class IX Class X
CBSE Grade X - Statistics
Question 1
1.
    • The daily wages of
    • 96
    • workers in a factory are given below.
    • Find the
    • median wage.
    • Wage (in rupees)
      20 - 28
      28 - 36
      36 - 44
      44 - 52
      52 - 60
      60 - 68
      No. of workers
      17
      25
      9
      17
      10
      18
  • ₹
    41.33
  • ₹
    42.00
  • ₹
    42.33
  • ₹
    41.67
  • ₹
    43.33
Question 2
2.
    • A frequency distribution table is given below.
    • Find the
    • mode .
    • Class-Interval
      10 - 19
      19 - 28
      28 - 37
      37 - 46
      46 - 55
      55 - 64
      Frequency
      16
      28
      42
      49
      49
      9
  • 45
  • 46
  • 48
  • 47
  • 44
Question 3
3.
    • Heights of 16 plants are given below. Find the mode.
    • Height (in cm)
      58
      60
      67
      73
      83
      84
      86
      87
      91
      99
      No. of plants
      4
      1
      1
      1
      3
      1
      1
      1
      2
      1
  • 57
    cm
  • 56
    cm
  • 58
    cm
  • 59
    cm
  • 60
    cm
Question 4
4.
    • Convert the continuous form of the class interval 41.5 - 51.5 to discontinuous form
  • 41.5
    -
    51
  • 42.5
    -
    50.5
  • 41.5
    -
    51.5
  • 42
    -
    51.5
  • 42
    -
    51
Question 5
5.
    • Scores of 15 students are given below. Find the mean.
    • Score
      73
      74
      75
      77
      80
      82
      83
      84
      85
      88
      No. of students
      1
      1
      2
      1
      2
      1
      4
      1
      1
      1
  • 247
    3
  • 242
    3
  • 244
    3
  • 241
    3
  • 81
Question 6
6.
    • Daily wages of 98 labourers (in ₹) are given below.
    • Identify the frequency distribution table for the given '
    • median
    • ' ogive.
  • Daily wage (in Rs)
    278 - 287
    288 - 297
    298 - 307
    308 - 317
    318 - 327
    328 - 337
    338 - 347
    348 - 357
    No. of labourers
    7
    5
    15
    6
    16
    19
    17
    13
  • Daily wage (in Rs)
    278 - 287
    288 - 297
    298 - 307
    308 - 317
    318 - 327
    328 - 337
    338 - 347
    348 - 357
    No. of labourers
    7
    5
    10
    15
    16
    19
    17
    13
  • Daily wage (in Rs)
    278 - 287
    288 - 297
    298 - 307
    308 - 317
    318 - 327
    328 - 337
    338 - 347
    348 - 357
    No. of labourers
    7
    5
    6
    15
    14
    19
    17
    13
  • Daily wage (in Rs)
    278 - 287
    288 - 297
    298 - 307
    308 - 317
    318 - 327
    328 - 337
    338 - 347
    348 - 357
    No. of labourers
    7
    5
    6
    15
    16
    19
    17
    13
  • Daily wage (in Rs)
    278 - 287
    288 - 297
    298 - 307
    308 - 317
    318 - 327
    328 - 337
    338 - 347
    348 - 357
    No. of labourers
    7
    13
    6
    15
    16
    19
    17
    5
Question 7
7.
    • Weights of 80 students (in kg) are given below.
    • Identify the frequency distribution table for the given '
    • more than
    • ' ogive.
  • Weight (in kg)
    55 - 62
    62 - 69
    69 - 76
    76 - 83
    83 - 90
    No. of students
    15
    12
    18
    18
    17
  • Weight (in kg)
    55 - 62
    62 - 69
    69 - 76
    76 - 83
    83 - 90
    No. of students
    15
    17
    15
    18
    12
  • Weight (in kg)
    55 - 62
    62 - 69
    69 - 76
    76 - 83
    83 - 90
    No. of students
    15
    14
    18
    18
    12
  • Weight (in kg)
    55 - 62
    62 - 69
    69 - 76
    76 - 83
    83 - 90
    No. of students
    15
    18
    17
    18
    12
  • Weight (in kg)
    55 - 62
    62 - 69
    69 - 76
    76 - 83
    83 - 90
    No. of students
    15
    17
    18
    18
    12
Question 8
8.
    • The following frequency distribution table gives
    • the monthly consumption of electricity of
    • 74
    • consumers in a locality.
    • Find the
    • mean units.
    • Monthly consumption (in units)
      59 - 69
      69 - 79
      79 - 89
      89 - 99
      99 - 109
      109 - 119
      119 - 129
      No. of consumers
      9
      16
      8
      13
      12
      5
      11
  • 3492
    37
    units
  • 3419
    37
    units
  • 3420
    37
    units
  • 3418
    37
    units
  • 3455
    37
    units
Question 9
9.
    • Heights of 15 plants are given below. Find the median.
    • Height (in cm)
      52
      62
      70
      74
      86
      91
      97
      100
      No. of plants
      2
      2
      3
      3
      1
      1
      1
      2
  • 73
    cm
  • 72
    cm
  • 75
    cm
  • 74
    cm
  • 76
    cm
Question 10
10.
    • Rainfall of 30 days are given below. Find the mean.
    • Rainfall (in mm)
      5
      6
      7
      8
      11
      12
      15
      No. of days
      2
      5
      4
      2
      4
      5
      8
  • 184
    15
    mm
  • 31
    3
    mm
  • 154
    15
    mm
  • 169
    15
    mm
  • 52
    5
    mm