The cost price of 10 pens is the same as the selling price of n pens. If there is a loss of 40%, approximately what is the value of n?

Created: 6 months ago | Updated: 1 month ago

Job Solution Dhaka Bank Ltd Dhaka Bank Ltd. || Trainee Officer (2019) || 2019 গণিত

প্রশ্নে বলা হচ্ছে যে, 10টি কলমের ক্রয়মূল্য n টি কলমের বিক্রয়মূল্যের সমান। কলম বিক্রয়ে 40% ক্ষতি হলে n এর সম্ভাব্য মান কত?

Let, the price of each pen be 1 Tk.

∴ Then the cost price of n pens is n Tk.

∴ And the selling price of n pens is 10 Tk.

Loss = n - 10

According to the question

$n - 10 = n o f 40 %$

$\Rightarrow n - 10 = \frac{40 \times n}{100}$

$\Rightarrow n - 10 = \frac{2 n}{5}$

$\Rightarrow 5 n - 50 = 2 n$

$\Rightarrow 5 n - 2 n = 50$

$\Rightarrow 3 n = 50$

$∴ n = \frac{50}{3} = 16.67 = 17 (a p p r o x)$

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