Kiran had 85 currency notes in all, some of which were of ₹ 100 denomination and the remaining of ₹ 50 denomination. The total amount of all these currency notes was ₹ 5000. How much amount did she have in the denomination of ₹ 50?
Answer
Answer (as printed):
Explanation
Let the number of 50-rupee notes be $x$. Then, the number of 100-rupee notes $=(85-x)$. $$\therefore \quad 50 x+100(85-x)=5000 \Leftrightarrow x+2(85-x)=100 \Leftrightarrow x=70 .$$ So, required amount $=₹(50 \times 70)=₹ 3500$.
Explanation as extracted from the printed page; notation may be imperfect.