Kiran bought 5 pens, 7 pencils and 4 erasers. Raju bought 6 pens, 8 erasers and 14 pencils for an amount which was half more than what kiran had paid. What % of the total amount paid by Kiran was paid for pens?

37.5%

50%

52%

62.5%

Let, 5 pens + 7 pencils + 4 erasers = x rupees so 10 pens + 14 pencils + 8 erasers = 2*x rupees also mentioned, 6 pens + 14 pencils + 8 erarsers = 1.5*x rupees so (10-6) = 4 pens = (2-1.5)x rupees so 4 pens = 0.5x rupees => 8 pens = x rupees so 5 pens = 5x/8 rupees = 5/8 of total (note x rupees is total amt paid byamal) i.e 5/8 = 500/8% = 62.5% is the answer

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