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तमिलनाडु बोर्ड ऑफ सेकेंडरी एज्युकेशनएसएसएलसी (अंग्रेजी माध्यम) कक्षा ७

If the average selling price of 15 books is ₹ 235, then the total selling price is __________ - Mathematics

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प्रश्न

If the average selling price of 15 books is ₹ 235, then the total selling price is __________

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उत्तर

If the average selling price of 15 books is ₹ 235, then the total selling price is 3,525

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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 1. (ii) | पृष्ठ ९९

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Solve any two of the following. 

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2, 3, 4, 1, 2, 3, 1, 5, 4, 2, 3, 1, 3, 5, 4, 3, 2, 2, 3, 2. Prepare a frequency table and find the mean of the data.


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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  2. State the score, the frequency of which is 5.
  3. Find N, and `sum f_ix_i`
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Mean can never be a fraction.


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