A man went to market with Ra.100.With that money he can buy 15 pencils or 25 pens.He kept 15% of that money for bus fare and with rest of the money he purchased 5 pencils,and 'x' pens. How many pens he purchased?
Question
A man went to market with Ra.100.With that money he can buy 15 pencils or 25 pens.He kept 15% of that money for bus fare and with rest of the money he purchased 5 pencils,and 'x' pens. How many pens he purchased?
Solution
First, let's find out how much money he kept for the bus fare. 15% of Rs.100 is Rs.15. So, he kept Rs.15 for the bus fare.
This means he had Rs.100 - Rs.15 = Rs.85 left to spend on pencils and pens.
The cost of one pencil is Rs.100 / 15 = Rs.6.67 (approximately).
The cost of one pen is Rs.100 / 25 = Rs.4.
He bought 5 pencils, which cost him 5 * Rs.6.67 = Rs.33.35 (approximately).
So, he had Rs.85 - Rs.33.35 = Rs.51.65 left to spend on pens.
Since each pen costs Rs.4, he could buy 'x' pens with the remaining money, where 'x' is Rs.51.65 / Rs.4 = 12.91.
Since he can't buy a fraction of a pen, we'll round this down to the nearest whole number.
So, he bought 12 pens.
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