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Five years ago, the average age of four boys was 9 years. Due to the joining of a new boy, the present age of the five of them became 15 years. Accordingly, what is the present age of the new boy?
  • a)
    14 years
  • b)
    6 years
  • c)
    15 years
  • d)
    19 years
  • e)
    None of the above/More than one of the above
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
Five years ago, the average age of four boys was 9 years. Due to the j...
Given information:
- Five years ago, the average age of four boys was 9 years.
- Due to the joining of a new boy, the present age of the five boys became 15 years.

Let's solve this problem step by step:

Step 1: Calculate the total age of the four boys five years ago.
The average age of four boys was 9 years five years ago, so the total age of the four boys would be:
4 boys * 9 years = 36 years

Step 2: Calculate the total age of the five boys at present.
The present average age of the five boys is 15 years, so the total age of the five boys would be:
5 boys * 15 years = 75 years

Step 3: Find the age of the new boy.
To find the age of the new boy, we need to subtract the total age of the four boys five years ago from the total age of the five boys at present:
Age of the new boy = Total age of five boys at present - Total age of four boys five years ago
Age of the new boy = 75 years - 36 years
Age of the new boy = 39 years

Therefore, the present age of the new boy is 39 years.

Final Answer: The present age of the new boy is 39 years (Option D).
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Community Answer
Five years ago, the average age of four boys was 9 years. Due to the j...
According to the given information-
Present average age of 4 boys (9+5) = 14 years.
Sum of Present ages of the 4 boys = 14 × 4 = 56 years
Present sum of ages of the 5 boys = 15 × 5= 75 years
Present age of the new boy ⇒ (75−56) = 19 years
Present age of the new boy = 19 years.
Hence, option(4) is the correct answer.
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Five years ago, the average age of four boys was 9 years. Due to the joining of a new boy, the present age of the five of them became 15 years. Accordingly, what is the present age of the new boy?a)14 yearsb)6 yearsc)15 yearsd)19 yearse)None of the above/More than one of the aboveCorrect answer is option 'D'. Can you explain this answer?
Question Description
Five years ago, the average age of four boys was 9 years. Due to the joining of a new boy, the present age of the five of them became 15 years. Accordingly, what is the present age of the new boy?a)14 yearsb)6 yearsc)15 yearsd)19 yearse)None of the above/More than one of the aboveCorrect answer is option 'D'. Can you explain this answer? for BPSC (Bihar) 2024 is part of BPSC (Bihar) preparation. The Question and answers have been prepared according to the BPSC (Bihar) exam syllabus. Information about Five years ago, the average age of four boys was 9 years. Due to the joining of a new boy, the present age of the five of them became 15 years. Accordingly, what is the present age of the new boy?a)14 yearsb)6 yearsc)15 yearsd)19 yearse)None of the above/More than one of the aboveCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for BPSC (Bihar) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Five years ago, the average age of four boys was 9 years. Due to the joining of a new boy, the present age of the five of them became 15 years. Accordingly, what is the present age of the new boy?a)14 yearsb)6 yearsc)15 yearsd)19 yearse)None of the above/More than one of the aboveCorrect answer is option 'D'. Can you explain this answer?.
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