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Quantitative Aptitude

Fundamental Principle of Counting

I. A. B, C. D...

Question

I. A. B, C. D, E and F are six members of a family. II. One couple has parents and their children in the family. III. A is the son of C and E is the daughter of A. IV. D is the daughter of F who is the mother of E. Which of the following pairs is the parents of the couple ?

A

AB

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B

BC

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C

AF

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D

CF

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Solution

The correct option is A BC
E is the daughter of A and F is the mother of E So, A is the father of E and hence the husband of F. Now, D is the daughter of F So. D and E are the daughters of A and F Also. A is the son of C. Now, only B remains Thus. B and C are the parents of A. Clearly. B and C are the parents of the couple

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