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A person has 2 parents, 4 grandparents, 8 great grandparents and so on. Total ancestors in ten generations?
A1024
B2046
C2048
D1022
Answer & Solution
Correct answer: B. 2046
The sum 2 + 4 + 8 + ... for 10 terms is 2(2^10 - 1)/(2 - 1) = 2046.
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