Question : The cost of 4 rings and 2 bangles of gold is INR 40,000. What is the cost of 10 rings and 5 bangles?
Option 1: INR 1,00,000
Option 2: INR 80,000
Option 3: INR 1,20,000
Option 4: INR 90,000
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Correct Answer: INR 1,00,000
Solution : Let the cost price of 1 ring and 1 bangle be Rs.$x$ and Rs.$y$, respectively. According to the question, $4x + 2y = 40000$ $⇒2.5 (4x + 2y) = 2.5 \times 40000$ $\therefore5x + 10y =100000$ Hence, the correct answer is INR 1,00,000.
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