Multiple choice

The ratio of the age of Ajay and his daughter is 11 : 3. 'N' year ago the the sum their ages decreased by 20 year while the ratio of their ages then was 17 : 1. Find the value of N. अजय और उसकी बेटी की आयु का अनुपात 9 : 4 है । 'N' वर्ष पहले उनकी आयु का योग 20 वर्ष कम हो गया, जबकि उस समय उनकी आयु का अनुपात 17 : 1 था। तो N का मान ज्ञात कीजिये ?

  1. 20

  2. 15

  3. 10

  4. 30
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The English text states ratio 11:3 but Hindi says 9:4 - this is a discrepancy. Checking with 11:3: Let Ajay=11x, daughter=3x. N years ago: (11x-N)+(3x-N) = 14x-2N. Current sum = 14x. So (14x) - (14x-2N) = 20 gives N=10. Check ratio at N=10: (11x-10):(3x-10) = 17:1. Solving gives x=5. So N=10 works with English text. Hindi text likely has a typo.

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