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04 Aug 2022, 10:13
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D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
85%
(hard)
Question Stats:
40% (02:32) correct
60%
(03:08)
wrong
based on 20
sessions
History
Date
Time
Result
Not Attempted Yet
Ten years ago, the ages of the members of a joint family of eight people added up to 231 years. Three years later, one member died at the age of 60 years and a child was born during the same year. After another three years, one more member died, again at 60, and a child was born during the same year. The current average age of this eight-member joint family is nearest to
A. 21
B. 22
C. 23
D. 24
E. 25
(adapted from gmatfree)
A. 21
B. 22
C. 23
D. 24
E. 25
(adapted from gmatfree)
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04 Aug 2022, 10:42
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10 years ago sum of 8 = 231
3 years after one died of age 60 and born = 231+8(3)- 60= 195
3 years later same = 195+ 8(3) - 60 = 159
Now = 159+8(4) = 191
Average = 191/8 = 23.875~ 24
Posted from my mobile device
3 years after one died of age 60 and born = 231+8(3)- 60= 195
3 years later same = 195+ 8(3) - 60 = 159
Now = 159+8(4) = 191
Average = 191/8 = 23.875~ 24
Posted from my mobile device
04 Aug 2022, 12:22
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Given: Ten years ago, the ages of the members of a joint family of eight people added up to 231 years. Three years later, one member died at the age of 60 years and a child was born during the same year. After another three years, one more member died, again at 60, and a child was born during the same year.
Asked: The current average age of this eight-member joint family is nearest to
10 years ago: -
The ages of the members of a joint family of eight people added up to = 231 years.
3 years later (7 years ago): -
The ages of the members of a joint family of eight people added up to = 231 + 3*8 - 60 = 195 years
6 years later (4 years ago):-
The ages of the members of a joint family of eight people added up to = 195 + 3*8 - 60 = 161 years
Presently : -
The ages of the members of a joint family of eight people added up to = 161 + 4*8 = 193 years
The current average age of this eight-member joint family is nearest to = 193/8 = 24 1/8 years
IMO D
Asked: The current average age of this eight-member joint family is nearest to
10 years ago: -
The ages of the members of a joint family of eight people added up to = 231 years.
3 years later (7 years ago): -
The ages of the members of a joint family of eight people added up to = 231 + 3*8 - 60 = 195 years
6 years later (4 years ago):-
The ages of the members of a joint family of eight people added up to = 195 + 3*8 - 60 = 161 years
Presently : -
The ages of the members of a joint family of eight people added up to = 161 + 4*8 = 193 years
The current average age of this eight-member joint family is nearest to = 193/8 = 24 1/8 years
IMO D
Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Problem Solving (PS) Forum
Still interested in this question? Check out the "Best Topics" block above for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
