CA Foundation · Quantitative Aptitude · Blood Relations
In a family, each of three brothers has exactly one sister, and the sister is the same for all. Each brother is married and has one child. How many persons are there in the family, counting the three brothers, their sister, the brothers' wives and children, and their parents?
There are 12 persons: three brothers, one common sister, three wives, three children and two parents. Adding 3 + 1 + 3 + 3 + 2 gives 12. No spouse is mentioned for the sister, so none is counted.
- A12Correct
- B13
- C11
- D10
Explanation
Brothers 3, sister 1, wives 3, children 3, parents 2. Total = 3 + 1 + 3 + 3 + 2 = 12. Choosing 13 wrongly adds the sister's husband, who is not mentioned; 10 omits the parents.
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