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Byju's Answer
Standard XII
Mathematics
Contra-Positive
IfP Q means P...
Question
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
\ast$ Q shows which of the relations of Q to N ?
A
Grand son
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B
Grand daughter
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C
Nephew
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D
Data is inadequate
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Solution
The correct option is
D
Data is inadequate
N # L
P
\ast$ Q means N is the mother of L, who is the father of P, who is the sister of Q.
So, L has a daughter P and another child Q, whose gender is not known.
N is P's mother.
So, we cannot say if Q is N's granddaughter or grandson.
option D.
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Q.
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 how is Q related to N if
N # L
P
\ast $ Q.
Q.
If
P
$
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,
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#
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means
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Then how is
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Q.
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Which of the following relations shows that
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Q.
Study the following information and answer the questions given below.
(i)
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÷
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means 'Q is the father of P'.
(ii)
′
P
×
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′
means 'P is the sister of Q'.
(iii)
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