A is the father of two children B and D, who are of different sexes. C is B’s spouse. E is of the same sex as D. B and C have two children: F, who is of the same sex as B, and G, who is of the same sex as C. E’s mother H, who is married to L, is the sister of D’s mother, M. E and E’s spouse I, have two children J and K, who are of the same sex as I. No person has married more than once and no children have been born out of wedlock. The only restrictions on marriage is that marriage to a sibling , to a direct descendant, or to more than one person at the same time are forbidden.QUESTION 12bookmark_borderSelect the correct answerIf the genetration of F and K's parents and their sibling contains more females than males, then which of the following must be true?radio_button_uncheckedK and G are of the same sexradio_button_uncheckedA is of the smae sex as Dradio_button_uncheckedJ is a maleradio_button_uncheckedThere are more females than males in J and K's generation
Question
A is the father of two children B and D, who are of different sexes. C is B’s spouse. E is of the same sex as D. B and C have two children: F, who is of the same sex as B, and G, who is of the same sex as C. E’s mother H, who is married to L, is the sister of D’s mother, M. E and E’s spouse I, have two children J and K, who are of the same sex as I. No person has married more than once and no children have been born out of wedlock. The only restrictions on marriage is that marriage to a sibling , to a direct descendant, or to more than one person at the same time are forbidden.QUESTION 12bookmark_borderSelect the correct answerIf the genetration of F and K's parents and their sibling contains more females than males, then which of the following must be true?radio_button_uncheckedK and G are of the same sexradio_button_uncheckedA is of the smae sex as Dradio_button_uncheckedJ is a maleradio_button_uncheckedThere are more females than males in J and K's generation
Solution
The question is a bit complex, but let's break it down:
- A is the father of B and D. We don't know the genders of B and D yet.
- C is B's spouse. We don't know the genders of B and C yet.
- E is the same sex as D. We don't know the gender of D or E yet.
- B and C have two children: F, who is the same sex as B, and G, who is the same sex as C.
- E's mother H is married to L and is the sister of D's mother, M. This means D's mother is not A, so A must be a male and D must be a female. Therefore, E is also female.
- E and E's spouse I have two children J and K, who are the same sex as I. We don't know the genders of I, J, or K yet.
The question states that the generation of F and K's parents and their siblings contains more females than males. This means that B, D, E, and I must be more females than males. We already know that D and E are females. So, B and I must also be females to make the number of females more than males.
This means:
- B and I are females.
- C and A are males.
- F (same sex as B) and K (same sex as I) are females.
- G (same sex as C) is a male.
- J (same sex as I) is a female.
So, the correct answer is: "J is a male" is false, because J is a female.
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