हिंदी

Find the class-mark of the class 35 - 40.

Advertisements
Advertisements

प्रश्न

Find the class-mark of the class 35 - 40.

योग
Advertisements

उत्तर

Class mark = `("Lower class limit" + "Upper class limit")/2`

Since, `(35 + 40)/2`

= `75/2`

= 37.5 

So, the class mark for the class 35 - 40 is 37.5.

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 7: Statistics - Practice set 7.3 [पृष्ठ ११८]

APPEARS IN

बालभारती Mathematics 1 [English] Standard 9 Maharashtra State Board
अध्याय 7 Statistics
Practice set 7.3 | Q (2) | पृष्ठ ११८

संबंधित प्रश्न

For class interval 20-25 write the lower class limit and the upper class limit.


Complete the Following Table.

Classes (age) Tally marks Frequency
(No. of students)
12 - 13 `cancel(bb|bb|bb|bb|)` `square`
13 - 14 `cancel(bb|bb|bb|bb|)` `cancel(bb|bb|bb|bb|)` `bb|bb|bb|bb|` `square`
14 - 15   `square`
15 - 16 `bb|bb|bb|bb|` `square`
    `bb(N = sumf = 35)`

38 people donated to an organisation working for differently abled persons. The amount in rupees were as follows:

101, 500, 401, 201, 301, 160, 210, 125, 175, 190, 450, 151, 101, 351, 251, 451, 151, 260, 360, 410, 150, 125, 161, 195, 351, 170, 225, 260, 290, 310, 360, 425, 420, 100, 105, 170, 250, 100.

  1. By taking classes 100-149, 150-199, 200-249... prepare grouped frequency distribution table.
  2. From the table, find the number of people who donated rupees 350 or more.

The marks of 24 candidates in the subject mathematics are given below:

45 48 15 23 30 35 40 11
29 0 3 12 48 50 18 30
15 30 11 42 23 2 3 44

The maximum marks are 50. Make a frequency distribution taking class intervals 0 - 10, 10-20, .......


Construct a frequency distribution table from the following cumulative frequency distribution:

C.I C.F
5 - 10  18
10 - 15 30
15 - 20 46
20 - 25 73
25 - 30  90

The height of 30 children in a class is given in centimetres. Draw up a frequency table of this data.
131, 135, 140, 138, 132, 133, 135, 133, 134, 135, 132, 133, 140, 139, 132, 131, 134, 133, 140, 140, 139, 136, 137, 136, 139, 137, 133, 134, 131, 140


If a class size is 10 and range is 80 then the number of classes are ___________


Inclusive series is a continuous series


Represent the following data in ungrouped frequency table which gives the number of children in 25 families.

1, 3, 0, 2, 5, 2, 3, 4, 1, 0, 5, 4, 3, 1, 3, 2, 5, 2, 1, 1, 2, 6, 2, 1, 4


Form a continuous frequency distribution table for the marks obtained by 30 students in a X std public examination.

328, 470, 405, 375, 298, 326, 276, 362, 410, 255, 391, 370, 455, 229, 300, 183, 283, 366, 400, 495, 215, 157, 374, 306, 280, 409, 321, 269, 398, 200


The number of times an observation occurs in the given data is called ________


In a class interval the upper limit of one class is the lower limit of the other class. This is _________ series


Size of the class 150 – 175 is ______.


Tally marks are used to find ______.


Upper limit of class interval 75 – 85 is ______.


In the class intervals 10 – 20, 20 – 30, etc., respectively, 20 lies in the class ______.


The class size of the class interval 60 – 68 is 8.


Construct a frequency distribution table for the following weights (in grams) of 35 mangoes, using the equal class intervals, one of them is 40 – 45 (45 not included).

30, 40, 45, 32, 43, 50, 55, 62, 70, 70, 61, 62, 53, 52, 50, 42, 35, 37, 53, 55, 65, 70, 73, 74, 45, 46, 58, 59, 60, 62, 74, 34, 35, 70, 68.

  1. How many classes are there in the frequency distribution table?
  2. Which weight group has the highest frequency?

Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×