Verified by Ajay Kumar
The marked prices of a pen and pencil are in the ratio of 5:6. The shopkeeper gives an 18% discount on the pen. If the total discount on both the pen and the pencil is 12%, then the discount offered on the pencil is:
7%
10%
11%
8%
Answer: A
Let the discount on the pencil be x%. Using the weighted average, (5 × 18 + 6x) / 11 = 12. Therefore, 90 + 6x = 132, so x = 7%.
एक पेन और पेंसिल का अंकित मूल्य 5:6 के अनुपात में है। दुकानदार पेन पर 18% की छूट देता है। अगर पेन और पेंसिल दोनों पर कुल छूट 12% है, तो पेंसिल पर दी गई छूट कितनी है?
7%
10%
11%
8%
उत्तर: A
मान लीजिए पेंसिल पर छूट x% है। भारित औसत के अनुसार, (5 × 18 + 6x) / 11 = 12। अतः 90 + 6x = 132, इसलिए x = 7%।
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