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.
Find the mean of first 9 whole numbers.
  • 5
  • 3
  • 2
  • 6
  • 4
Question 2
2.
    • Rainfall of 20 days are given below. Find the median.
    • Rainfall (in mm)
      6
      7
      8
      12
      13
      14
      15
      No. of days
      3
      2
      5
      4
      2
      2
      2
  • 9
    mm
  • 8
    mm
  • 11
    mm
  • 12
    mm
  • 10
    mm
Question 3
3.
    • The mean of the below random sample is
    • 26
      1
      10
    • .
    • Find the missing quantity.
      • 47
      • 12
      • 16
      • 23
      • 39
      • 18
      • 26
      • 25
      • x
      • 17
  • 39
  • 38
  • 37
  • 36
  • 41
Question 4
4.
    • Wages of 30 labourers are given below. Find the median.
    • Wage (in rupees)
      300
      315
      345
      376
      392
      405
      436
      471
      No. of labourers
      4
      2
      6
      4
      6
      4
      2
      2
  • ₹
    376.00
  • ₹
    375.00
  • ₹
    377.00
  • ₹
    378.00
  • ₹
    374.00
Question 5
5.
Find the mean of all prime numbers between 40 and 100.
  • 865
    13
  • 199
    3
  • 731
    11
  • 861
    13
  • 863
    13
Question 6
6.
    • The observations of an ungrouped data are
    • x

      1
    • ,
    • x

      2
    • ,
    • 2x

      1
    • and
    • x

      1
    • <
    • x

      2
    • <
    • 2x

      1
    • .
    • If the mean and median of the data are equal to
    • 6
    • ,
    • find the observations of the data
      • 5
      • ,
      • 6
      • ,
      • 10
      • 8
      • ,
      • 6
      • ,
      • 16
      • 4
      • ,
      • 6
      • ,
      • 8
      • 8
      • ,
      • 6
      • ,
      • 12
Question 7
7.
    • Given the mean of
    • 10
    • samples as
    • 5
      3
      5
    • ,
    • what is the new mean if two samples
    • 1
    • and
    • 8
    • are added ?
  • 65
    12
  • 67
    12
  • 75
    14
  • 11
    2
  • 21
    4
Question 8
8.
    • If the mean of
      • 1
      • 8
      • 7
      • 5
    • x
      • 4
      • 3
      • 6
    • is
    • 4
      1
      2
    • ,
    • find the value of x.
  • 1
  • 3
  • 0
  • 5
  • 2
Question 9
9.
    • Rainfall of 10 days (in mm) are given below. Find the median rainfall.
      • 10
      • 14
      • 7
      • 14
      • 14
      • 14
      • 12
      • 12
      • 14
      • 11
  • 13
    mm
  • 14
    mm
  • 11
    mm
  • 12
    mm
  • 15
    mm
Question 10
10.
Find the median of first 8 whole numbers.
  • 9
    2
  • 4
  • 7
    2
  • 5
    2
  • 13
    4