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The average of age of father and mother is 45 years. If the age of daughter is included. The average of the three falls to 35. Find the age of daughter ?
- a)15
- b)10
- c)5
- d)20
Correct answer is option 'A'. Can you explain this answer?
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Verified Answer
The average of age of father and mother is 45 years. If the age of dau...
Given,
(f+m)/2=45
=>f+m=90......(1)
Similarly, f+m+d=105......(2)
Subracting (2) from (1) we get,
d=15
(f+m)/2=45
=>f+m=90......(1)
Similarly, f+m+d=105......(2)
Subracting (2) from (1) we get,
d=15
Most Upvoted Answer
The average of age of father and mother is 45 years. If the age of dau...
Problem:
The average age of a father and mother is 45 years. Including the age of their daughter, the average age of the three individuals falls to 35 years. Find the age of the daughter.
Solution:
Let's assume the age of the father is "F" years, the age of the mother is "M" years, and the age of the daughter is "D" years.
Average of Father and Mother:
The average of the father and mother's age is given as 45 years.
So, (F + M)/2 = 45
Average of Father, Mother, and Daughter:
When the daughter's age is included, the average of the three individuals becomes 35 years.
So, (F + M + D)/3 = 35
Calculating Daughter's Age:
To find the age of the daughter, we need to solve the above two equations.
From the equation (1), we can express F in terms of M:
F = 90 - M
Substituting this value of F in equation (2), we get:
(90 - M + M + D)/3 = 35
90 + D = 105
D = 105 - 90
D = 15
Hence, the age of the daughter is 15 years.
Answer:
The age of the daughter is 15 years. Therefore, the correct option is (A).
The average age of a father and mother is 45 years. Including the age of their daughter, the average age of the three individuals falls to 35 years. Find the age of the daughter.
Solution:
Let's assume the age of the father is "F" years, the age of the mother is "M" years, and the age of the daughter is "D" years.
Average of Father and Mother:
The average of the father and mother's age is given as 45 years.
So, (F + M)/2 = 45
Average of Father, Mother, and Daughter:
When the daughter's age is included, the average of the three individuals becomes 35 years.
So, (F + M + D)/3 = 35
Calculating Daughter's Age:
To find the age of the daughter, we need to solve the above two equations.
From the equation (1), we can express F in terms of M:
F = 90 - M
Substituting this value of F in equation (2), we get:
(90 - M + M + D)/3 = 35
90 + D = 105
D = 105 - 90
D = 15
Hence, the age of the daughter is 15 years.
Answer:
The age of the daughter is 15 years. Therefore, the correct option is (A).
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The average of age of father and mother is 45 years. If the age of daughter is included. The average of the three falls to 35. Find the age of daughter ?a)15b)10c)5d)20Correct answer is option 'A'. Can you explain this answer?
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The average of age of father and mother is 45 years. If the age of daughter is included. The average of the three falls to 35. Find the age of daughter ?a)15b)10c)5d)20Correct answer is option 'A'. Can you explain this answer? for Railways 2024 is part of Railways preparation. The Question and answers have been prepared according to the Railways exam syllabus. Information about The average of age of father and mother is 45 years. If the age of daughter is included. The average of the three falls to 35. Find the age of daughter ?a)15b)10c)5d)20Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for Railways 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The average of age of father and mother is 45 years. If the age of daughter is included. The average of the three falls to 35. Find the age of daughter ?a)15b)10c)5d)20Correct answer is option 'A'. Can you explain this answer?.
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