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  9. Q25

ibps-rrb-oa 2017 · Question 25 of 56

After replacing an old member by a new member, it was found that the average age of four members of a family is the same as it was 3 year ago. What is the difference between the ages of the replaced and the new member ?

  1. A(a) 10 years
  2. B(b) 11 years
  3. C(c) 12 yearsCorrect
  4. D(d) 8 years
  5. E(e) None of these

Answer: C. (c) 12 years

Explanation

Let the sum of their present ages = x years After replacing, sum of their ages= x-(4*3)= x -12 years

Source: IBPS RRB Office Assistant Prelims 2017 Paper (with Answers & Solutions) - Examrace · memory-based

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