CA Foundation · Quantitative Aptitude · Blood Relations
A family has A, B, C, D, E and F. A and B are a married couple, and A is the male. D is the only son of C, and C is the brother of A. E is the daughter of B. F is the sister of D. How many of the six are first cousins of E, and what is E's relation to F?
Two members, D and F, are first cousins of E, and E is F's cousin. E is the daughter of A, and D and F are children of A's brother C. Children of brothers are cousins to each other.
- AOne; E is F's cousin
- BTwo; E is F's cousinCorrect
- CTwo; E is F's sister
- DThree; E is F's niece
Explanation
E is the daughter of A and B. C is A's brother, so C's children D and F are E's first cousins. D is C's only son and F is D's sister, so both are cousins of E. That gives two cousins, and E is F's cousin. Calling E F's sister would wrongly treat them as children of the same parents.
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