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Raju has 14 currency notes in his pocket consisting of only Rs. 20 notes and Rs. 10 notes. The total value of the notes is Rs. 230. The number of Rs. 10 notes Raju has is

Correct answer: 5

Solution

Let the number of Rs. 10 notes be x and Rs. 20 notes be y. Then x + y = 14 and 10x + 20y = 230. Solving gives x = 5.

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