Defence Exam > Defence Questions > After replacing an old member by a new member...
Start Learning for Free
After replacing an old member by a new member, it was found that the average age of five members of a club is the same as it was 3 years ago. What is the difference between the age of the replaced member and new member?
- a)2 years
- b)8 years
- c)15 years
- d)25 years
Correct answer is option 'C'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Verified Answer
After replacing an old member by a new member, it was found that the a...
Age decreased = (5 × 3) years = 15 years
So, the required difference = 15 years
Most Upvoted Answer
After replacing an old member by a new member, it was found that the a...
Let's assume the ages of the five members of the club before the replacement are A, B, C, D, and E. After the replacement, the ages of the new members are A, B, C, D, and F.
Let's calculate the average age of the members before the replacement. We know that the average is the sum of the ages divided by the number of members.
Average age before replacement = (A + B + C + D + E)/5
Now, let's calculate the average age of the members after the replacement, which is the same as it was 3 years ago. Since the average age hasn't changed, it means that the sum of the ages of the members after the replacement is the same as it was 3 years ago.
Average age after replacement = (A + B + C + D + F)/5
Since the average age hasn't changed, we can equate the two equations:
(A + B + C + D + E)/5 = (A + B + C + D + F)/5
Simplifying the equation:
A + B + C + D + E = A + B + C + D + F
The terms A, B, C, and D cancel out from both sides of the equation:
E = F
This means that the age of the replaced member (E) is equal to the age of the new member (F). Therefore, the difference between their ages is zero.
However, the given options do not include zero as a possible answer. This suggests that there might be a mistake in the question or options provided. Without any additional information, it is not possible to determine the correct answer.
Let's calculate the average age of the members before the replacement. We know that the average is the sum of the ages divided by the number of members.
Average age before replacement = (A + B + C + D + E)/5
Now, let's calculate the average age of the members after the replacement, which is the same as it was 3 years ago. Since the average age hasn't changed, it means that the sum of the ages of the members after the replacement is the same as it was 3 years ago.
Average age after replacement = (A + B + C + D + F)/5
Since the average age hasn't changed, we can equate the two equations:
(A + B + C + D + E)/5 = (A + B + C + D + F)/5
Simplifying the equation:
A + B + C + D + E = A + B + C + D + F
The terms A, B, C, and D cancel out from both sides of the equation:
E = F
This means that the age of the replaced member (E) is equal to the age of the new member (F). Therefore, the difference between their ages is zero.
However, the given options do not include zero as a possible answer. This suggests that there might be a mistake in the question or options provided. Without any additional information, it is not possible to determine the correct answer.
|
Explore Courses for Defence exam
|
|
Similar Defence Doubts
After replacing an old member by a new member, it was found that the average age of five members of a club is the same as it was 3 years ago. What is the difference between the age of the replaced member and new member?a)2 yearsb)8 yearsc)15 yearsd)25 yearsCorrect answer is option 'C'. Can you explain this answer?
Question Description
After replacing an old member by a new member, it was found that the average age of five members of a club is the same as it was 3 years ago. What is the difference between the age of the replaced member and new member?a)2 yearsb)8 yearsc)15 yearsd)25 yearsCorrect answer is option 'C'. Can you explain this answer? for Defence 2024 is part of Defence preparation. The Question and answers have been prepared according to the Defence exam syllabus. Information about After replacing an old member by a new member, it was found that the average age of five members of a club is the same as it was 3 years ago. What is the difference between the age of the replaced member and new member?a)2 yearsb)8 yearsc)15 yearsd)25 yearsCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Defence 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for After replacing an old member by a new member, it was found that the average age of five members of a club is the same as it was 3 years ago. What is the difference between the age of the replaced member and new member?a)2 yearsb)8 yearsc)15 yearsd)25 yearsCorrect answer is option 'C'. Can you explain this answer?.
After replacing an old member by a new member, it was found that the average age of five members of a club is the same as it was 3 years ago. What is the difference between the age of the replaced member and new member?a)2 yearsb)8 yearsc)15 yearsd)25 yearsCorrect answer is option 'C'. Can you explain this answer? for Defence 2024 is part of Defence preparation. The Question and answers have been prepared according to the Defence exam syllabus. Information about After replacing an old member by a new member, it was found that the average age of five members of a club is the same as it was 3 years ago. What is the difference between the age of the replaced member and new member?a)2 yearsb)8 yearsc)15 yearsd)25 yearsCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Defence 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for After replacing an old member by a new member, it was found that the average age of five members of a club is the same as it was 3 years ago. What is the difference between the age of the replaced member and new member?a)2 yearsb)8 yearsc)15 yearsd)25 yearsCorrect answer is option 'C'. Can you explain this answer?.
Solutions for After replacing an old member by a new member, it was found that the average age of five members of a club is the same as it was 3 years ago. What is the difference between the age of the replaced member and new member?a)2 yearsb)8 yearsc)15 yearsd)25 yearsCorrect answer is option 'C'. Can you explain this answer? in English & in Hindi are available as part of our courses for Defence.
Download more important topics, notes, lectures and mock test series for Defence Exam by signing up for free.
Here you can find the meaning of After replacing an old member by a new member, it was found that the average age of five members of a club is the same as it was 3 years ago. What is the difference between the age of the replaced member and new member?a)2 yearsb)8 yearsc)15 yearsd)25 yearsCorrect answer is option 'C'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
After replacing an old member by a new member, it was found that the average age of five members of a club is the same as it was 3 years ago. What is the difference between the age of the replaced member and new member?a)2 yearsb)8 yearsc)15 yearsd)25 yearsCorrect answer is option 'C'. Can you explain this answer?, a detailed solution for After replacing an old member by a new member, it was found that the average age of five members of a club is the same as it was 3 years ago. What is the difference between the age of the replaced member and new member?a)2 yearsb)8 yearsc)15 yearsd)25 yearsCorrect answer is option 'C'. Can you explain this answer? has been provided alongside types of After replacing an old member by a new member, it was found that the average age of five members of a club is the same as it was 3 years ago. What is the difference between the age of the replaced member and new member?a)2 yearsb)8 yearsc)15 yearsd)25 yearsCorrect answer is option 'C'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice After replacing an old member by a new member, it was found that the average age of five members of a club is the same as it was 3 years ago. What is the difference between the age of the replaced member and new member?a)2 yearsb)8 yearsc)15 yearsd)25 yearsCorrect answer is option 'C'. Can you explain this answer? tests, examples and also practice Defence tests.
|
|
Explore Courses for Defence exam
|
|
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup