CBSE Board Practice

Class VI Class VII Class VIII Class IX Class X
CBSE Grade X - Statistics
Question 1
1.
    • Rainfall of 30 days are given below. Find the median.
    • Rainfall (in mm)
      5
      7
      8
      9
      11
      12
      14
      15
      No. of days
      1
      7
      4
      2
      5
      3
      7
      1
  • 13
    mm
  • 11
    mm
  • 9
    mm
  • 10
    mm
  • 12
    mm
Question 2
2.
    • The given ogive represents the heights of workers (in cm) in a factory.
    • Find the number of workers whose height is more than
    • 142 cm
  • 55
  • 54
  • 45
  • 50
  • 46
Question 3
3.
    • Scores of 10 students are given below. Find the median.
    • Score
      71
      74
      77
      86
      87
      88
      90
      No. of students
      1
      1
      3
      2
      1
      1
      1
  • 167
    2
  • 163
    2
  • 165
    2
  • 82
Question 4
4.
    • If the upper and lower limit of class interval are 46 and 41 respectively, then the class interval is
  • 41
    -
    46.5
  • 41.5
    -
    45.5
  • 40.5
    -
    46.5
  • 41
    -
    46
  • 40.5
    -
    46
Question 5
5.
    • The following table shows the weights of
    • 57
    • persons in a group.
    • Find the
    • median weight.
    • Weight (in kg)
      10 - 18
      18 - 26
      26 - 34
      34 - 42
      42 - 50
      No. of persons
      15
      13
      11
      5
      13
  • 301
    11
    kg
  • 291
    11
    kg
  • 290
    11
    kg
  • 292
    11
    kg
  • 312
    11
    kg
Question 6
6.
    • Scores of 83 students are given below.
    • Identify the frequency distribution table for the given '
    • less than
    • ' ogive.
  • Score
    70 - 75
    75 - 80
    80 - 85
    85 - 90
    90 - 95
    95 - 100
    No. of students
    15
    17
    13
    14
    7
    20
  • Score
    70 - 75
    75 - 80
    80 - 85
    85 - 90
    90 - 95
    95 - 100
    No. of students
    15
    13
    17
    11
    7
    20
  • Score
    70 - 75
    75 - 80
    80 - 85
    85 - 90
    90 - 95
    95 - 100
    No. of students
    15
    17
    13
    11
    7
    20
  • Score
    70 - 75
    75 - 80
    80 - 85
    85 - 90
    90 - 95
    95 - 100
    No. of students
    15
    17
    9
    11
    7
    20
  • Score
    70 - 75
    75 - 80
    80 - 85
    85 - 90
    90 - 95
    95 - 100
    No. of students
    15
    20
    13
    11
    7
    17
Question 7
7.
    • Heights of 70 students (in cm) are given below.
    • Identify the frequency distribution table for the given '
    • more than
    • ' ogive.
  • Height (in cm)
    124 - 132
    132 - 140
    140 - 148
    148 - 156
    156 - 164
    164 - 172
    172 - 180
    No. of students
    7
    8
    5
    12
    13
    8
    17
  • Height (in cm)
    124 - 132
    132 - 140
    140 - 148
    148 - 156
    156 - 164
    164 - 172
    172 - 180
    No. of students
    7
    5
    17
    12
    13
    8
    8
  • Height (in cm)
    124 - 132
    132 - 140
    140 - 148
    148 - 156
    156 - 164
    164 - 172
    172 - 180
    No. of students
    7
    17
    5
    15
    13
    8
    8
  • Height (in cm)
    124 - 132
    132 - 140
    140 - 148
    148 - 156
    156 - 164
    164 - 172
    172 - 180
    No. of students
    7
    17
    8
    12
    13
    8
    8
  • Height (in cm)
    124 - 132
    132 - 140
    140 - 148
    148 - 156
    156 - 164
    164 - 172
    172 - 180
    No. of students
    7
    17
    5
    12
    13
    8
    8
Question 8
8.
    • The upper limit of the class with frequency x is
    • Class-Interval
      Frequency
      46 - 56
      4
      56 - 66
      7
      66 - 76
      2
      76 - 86
      18
      86 - 96
      x
  • 97
  • 95
  • 96
  • 94
  • 99
Question 9
9.
    • The marks obtained by 49 students of a class in an examination is given below. Calculate the mean mark correct to 2 decimal places.
    • Marks
      less than 20
      less than 30
      less than 40
      less than 50
      less than 60
      less than 70
      No. of students
      6
      14
      23
      33
      43
      49
  • 40.71
  • 43.71
  • 45.71
  • 35.71
  • 37.71
Question 10
10.
    • Heights of 31 plants are given below. Find the mode.
    • Height (in cm)
      56
      58
      71
      72
      82
      83
      85
      91
      93
      97
      No. of plants
      7
      2
      1
      2
      5
      1
      2
      2
      4
      5
  • 55
    cm
  • 58
    cm
  • 56
    cm
  • 57
    cm
  • 54
    cm