Multiple choice

The average age A,B,C,D five years ago was 45 years. By including x, the present average age of all the five is 49 years. The present age of x is- 5 वर्ष पहले A,B,C,D की औसत आयु 45 वर्ष थी यदि x को शामिल कर लिया जाय तो इन पांचों की वर्तमान औसत आयु 49 वर्ष हो जाती है। x की वर्तमान आयु है-

  1. 64 years/वर्ष

  2. 48 years/वर्ष

  3. 45 years/वर्ष

  4. 42 years/वर्ष
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

5 years ago: average of A,B,C,D = 45, so their sum was 45×4 = 180. Present sum = 180 + (4×5) = 200. Including x: present average of 5 = 49, so sum = 49×5 = 245. Therefore x's age = 245 - 200 = 45 years. Answer C is correct.

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