Multiple choice

B is as more younger than C as he is elder than A. Ratio of ages of A to C is 5 : 9. If B‘s age after 10 years will be 24, find the average of all of their present ages. B, C की तुलना में उतना ही छोटा है जितना की वह A से बड़ा है| A का C से आयु का अनुपात 5: 9 है। यदि 10 वर्ष के बाद B की आयु 24 वर्ष होगी, तो सभी के वर्तमान आयु का औसत ज्ञात कीजिए।

  1. 15

  2. 16

  3. 14

  4. 22

  5. 19

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

B's age after 10 years = 24, so present age = 14. B is equally younger than C and elder than A, meaning B's age is exactly midway between A and C. Therefore, A + C = 2B = 28. Given A:C = 5:9, let A = 5k, C = 9k. Then 5k + 9k = 28, giving k = 2. So A = 10, B = 14, C = 18. Average = (10+14+18)/3 = 14.