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.
    • Scores of 10 students are given below. Find the median.
    • Score
      79
      80
      81
      82
      83
      85
      87
      No. of students
      1
      2
      1
      1
      2
      1
      2
  • 167
    2
  • 83
  • 165
    2
  • 169
    2
Question 2
2.
Find the median of all the factors of 40.
  • 25
    4
  • 13
    2
  • 11
    2
  • 15
    2
  • 7
Question 3
3.
    • The mean of
    • 9
    • numbers is
    • 12
      8
      9
    • .
    • Upon
    • adding
    • one number,
    • the mean becomes
    • 13
    • .
    • Find the
    • included
    • number.
  • 11
  • 14
  • 15
  • 16
  • 13
Question 4
4.
    • The marks obtained by 12 students in a test are given below. Find the mean of their marks when the marks of each student is increased by 2.
      • 29
      • 15
      • 24
      • 32
      • 31
      • 34
      • 33
      • 27
      • 27
      • 23
      • 27
      • 41
  • 307
    10
  • 365
    12
  • 367
    12
  • 123
    4
  • 61
    2
Question 5
5.
    • Ages of 15 students are given below. Find the median.
    • Age (in years)
      10
      11
      12
      13
      14
      15
      No. of students
      2
      2
      5
      2
      3
      1
  • 13
    years
  • 11
    years
  • 12
    years
  • 10
    years
  • 14
    years
Question 6
6.
    • Given the mean of
    • 13
    • samples as
    • 10
      3
      13
    • ,
    • what is the mean if a sample value is
    • increased
    • by
    • 12
    • ?
  • 145
    13
  • 123
    11
  • 167
    15
  • 11
  • 147
    13
Question 7
7.
    • Given the mean of
    • 12
    • samples as
    • 9
    • ,
    • what is the mean if a sample value is
    • decreased
    • by
    • 15
    • ?
  • 15
    2
  • 17
    2
  • 31
    4
  • 33
    4
  • 29
    4
Question 8
8.
    • If the mean of
    • 5
    • samples is
    • 22
      3
      5
    • ,
    • what is the new mean if each number is multiplied by
    • 10
    • .
  • 226
  • 229
  • 225
  • 227
  • 224
Question 9
9.
Find the median of all prime numbers between 20 and 100.
  • 62
  • 60
  • 59
  • 58
  • 56
Question 10
10.
    • Given the mean of
    • 10
    • samples as
    • 6
    • ,
    • what is the new mean if two samples
    • 5
    • and
    • 4
    • are added ?
  • 25
    4
  • 21
    4
  • 13
    2
  • 23
    4
  • 11
    2