AP Police SI previous year question
Avg age of 2 sons+father exceeds avg age of 2 sons+mother by 4. Avg of all 4 = 19, avg of 2 sons = 6. Ratio of father's to mother's age is
Asked in AP Police SI Prelims: 2018 (Paper I & II) · Quantitative Aptitude
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Correct answer: (A) 19:13
Sum of 4 = 76, sum of sons = 12, so father+mother = 64. (F−M)/3 = 4 → F−M=12. Solving: F=38, M=26. Ratio = 19:13.
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हिंदी में प्रश्न
2 बेटों और पिता की औसत आयु, 2 बेटों और माता की औसत आयु से 4 अधिक है। सभी 4 की औसत आयु = 19 है, 2 बेटों की औसत आयु = 6 है। पिता और माता की आयु का अनुपात है
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उत्तर और व्याख्या देखें
सही उत्तर: (A) 19:13
चारों का योग = 76, पुत्रों का योग = 12, अतः पिता+माता = 64। (F−M)/3 = 4 → F−M=12। हल करने पर: F=38, M=26। अनुपात = 19:13।
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