Solved UPSC CDS/OTA Question
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Q · Average Medium · 45s
The average age of 4 members of a family is 20 yr. If the youngest member is 4 yr old, what was the average age of the family at the time of the birth of the youngest member?
TopicAverage
Question Typemultiple choice
DifficultyMedium
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
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Final Answer: Option B