Discussion
If P $ Q means P is the father of Q; P # Q means P is the mother of Q and P * Q means P is the sister of Q, then N # L $ P * Q shows which of the relation of Q to N?
Answer: D
Correct answer: Data is inadequate
N # L makes N the mother of L; L $ P makes L the father of P; P * Q makes P the sister of Q, so Q is also L’s child and N’s grandchild. But nothing says whether Q is a boy or a girl, so we cannot choose between grandson and granddaughter - the data are inadequate.
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