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The average age of a family of 5 members is 20 years. If the age of the youngest member is 10 years, what was the average age of the family at the birth of the youngest member?
- a)12.50
- b)15.25
- c)21.25
- d)18.75
Correct answer is option 'D'. Can you explain this answer?
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Verified Answer
The average age of a family of 5 members is 20 years. If the age of th...
At present the total age of the family = 5 × 20 =100
The total age of the family at the time of the birth of the youngest member,
= 100 - 10 - (10 × 4)
= 50
Therefore, average age of the family at the time of birth of the youngest member,
= 50/4 =12.5
The total age of the family at the time of the birth of the youngest member,
= 100 - 10 - (10 × 4)
= 50
Therefore, average age of the family at the time of birth of the youngest member,
= 50/4 =12.5
Most Upvoted Answer
The average age of a family of 5 members is 20 years. If the age of th...
Given:
- The average age of a family of 5 members is 20 years.
- The age of the youngest member is 10 years.
To find: What was the average age of the family at the birth of the youngest member?
Solution:
Let the sum of the ages of the family at present be S.
We know that the average age of the family is 20 years. So, we can write:
S/5 = 20
S = 100
Let the sum of the ages of the family at the time of the birth of the youngest member be T.
We know that the age of the youngest member at present is 10 years. So, at the time of the birth of the youngest member, the age of the youngest member was 0 years. Therefore, we can write:
T + 10 = S
Substituting the value of S, we get:
T + 10 = 100
T = 90
So, the sum of the ages of the family at the time of the birth of the youngest member was 90.
Since there were 5 members in the family at that time, the average age of the family at the birth of the youngest member was:
90/5 = 18 years
Therefore, the answer is option (D) 12.50.
- The average age of a family of 5 members is 20 years.
- The age of the youngest member is 10 years.
To find: What was the average age of the family at the birth of the youngest member?
Solution:
Let the sum of the ages of the family at present be S.
We know that the average age of the family is 20 years. So, we can write:
S/5 = 20
S = 100
Let the sum of the ages of the family at the time of the birth of the youngest member be T.
We know that the age of the youngest member at present is 10 years. So, at the time of the birth of the youngest member, the age of the youngest member was 0 years. Therefore, we can write:
T + 10 = S
Substituting the value of S, we get:
T + 10 = 100
T = 90
So, the sum of the ages of the family at the time of the birth of the youngest member was 90.
Since there were 5 members in the family at that time, the average age of the family at the birth of the youngest member was:
90/5 = 18 years
Therefore, the answer is option (D) 12.50.
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The average age of a family of 5 members is 20 years. If the age of the youngest member is 10 years, what was the average age of the family at the birth of the youngest member?a)12.50b)15.25c)21.25d)18.75Correct answer is option 'D'. Can you explain this answer?
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The average age of a family of 5 members is 20 years. If the age of the youngest member is 10 years, what was the average age of the family at the birth of the youngest member?a)12.50b)15.25c)21.25d)18.75Correct answer is option 'D'. Can you explain this answer? for Quant 2024 is part of Quant preparation. The Question and answers have been prepared according to the Quant exam syllabus. Information about The average age of a family of 5 members is 20 years. If the age of the youngest member is 10 years, what was the average age of the family at the birth of the youngest member?a)12.50b)15.25c)21.25d)18.75Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for Quant 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The average age of a family of 5 members is 20 years. If the age of the youngest member is 10 years, what was the average age of the family at the birth of the youngest member?a)12.50b)15.25c)21.25d)18.75Correct answer is option 'D'. Can you explain this answer?.
The average age of a family of 5 members is 20 years. If the age of the youngest member is 10 years, what was the average age of the family at the birth of the youngest member?a)12.50b)15.25c)21.25d)18.75Correct answer is option 'D'. Can you explain this answer? for Quant 2024 is part of Quant preparation. The Question and answers have been prepared according to the Quant exam syllabus. Information about The average age of a family of 5 members is 20 years. If the age of the youngest member is 10 years, what was the average age of the family at the birth of the youngest member?a)12.50b)15.25c)21.25d)18.75Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for Quant 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The average age of a family of 5 members is 20 years. If the age of the youngest member is 10 years, what was the average age of the family at the birth of the youngest member?a)12.50b)15.25c)21.25d)18.75Correct answer is option 'D'. Can you explain this answer?.
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