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तमिलनाडु बोर्ड ऑफ सेकेंडरी एज्युकेशनएसएसएलसी (अंग्रेजी माध्यम) कक्षा ७

The marks of 14 students in a science test out of 50 are given below. 34, 23, 10, 45, 44, 47, 35, 37, 41, 30, 28, 32, 45, 39 Find the maximum mark obtained

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प्रश्न

The marks of 14 students in a science test out of 50 are given below. 34, 23, 10, 45, 44, 47, 35, 37, 41, 30, 28, 32, 45, 39 Find the maximum mark obtained

योग
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उत्तर

Given: 34, 23, 10, 45, 44, 47, 35, 37, 41, 30, 28, 32, 45, 39

Maximum mark obtained = 47

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अध्याय 5: Statistics - Exercise 5.1 [पृष्ठ ९९]

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सामाचीर कलवी Mathematics - Term 3 [English] Class 7 TN Board
अध्याय 5 Statistics
Exercise 5.1 | Q 3. (ii) | पृष्ठ ९९

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Solve any two of the following. 

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The mean of 35 observations is 20, out of which mean of first 18 observations is 15 and mean of last 18 observation is 25. Find the 18th observation.


The following table shows the electricity (in units) used by 25 families of Eklara village in a month of May. Complete the table and answer the following questions.

Electricity used
(units) `bb(x_i)`
No. of Families
(frequency) `bb(f_i)`
`bb(f_ix_i)`
30 7 _________
45 2 __________
60 8 __________
75 5 __________
90 3 __________
  N = _________ `sum f_ix_i` = ______
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  3. Find N, and `sum f_ix_i`
  4. Find the mean of electricity used by each family in the month of May.

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No. of students 6 8 p 10 6

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The mean of three numbers is 10. The mean of other four numbers is 12. Find the mean of all the numbers.


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