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प्रश्न
2 oranges, 3 bananas and 4 apples taken together cost ₹ 15.00. 3 oranges, 2 bananas and 1 apple cost ₹ 10.00. Then the cost of 3 oranges, 3 bananas and 3 apples cost.
विकल्प
₹ 12.00
₹ 16.00
₹ 20.00
₹ 15.00
MCQ
उत्तर
₹ 15.00
Explanation:
Cost of 1 orange = ₹ x
1 banana = ₹ y
1 apple = ₹ z
∴ 2x + 3y + 4z = ₹ 15
3x + 2y + z = ₹ 10
On adding,
5x + 5y + 5z = ₹ 25
⇒ x + y + z = ₹ 5
On multiplying by 3,
3x + 3y + 3z = ₹ 15
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Number System (Entrance Exam)
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