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A ∆ B means A is B’s mother. A © B means A is sister of B. A * B means A is B’s father. A € B means A is brother of B. A + B means that A is married to B. Which of the following means that X is U’s mother?

A ∆ B means A is B’s mother. A © B means A is sister of B. A * B means A is B’s father. A € B means A is brother of B. A + B means that A is married to B. Which of the following means that X is U’s mother? Correct Answer P € X ∆ O © U

A is

Symbol

∆

©

*

€

+

Meaning

Mother

Sister

Father

Brother

Married

to B

By using the symbols in the table given below, we can draw the following family tree:

1) X ∆ Y € Z * K © U → X is the mother of Y, Y is the brother of Z, Z is the father of K, K is the sister of U.

[ alt="F1 Chitranshi 21-04-21 Savita D9" src="//storage.googleapis.com/tb-img/production/21/04/F1_Chitranshi_21-04-21_Savita_D9.png" style="width: 139px; height: 213px;">

Clearly, X is the grandmother of U.

2) P € X ∆ O © U → P is the brother of X, X is the mother of O, O is the sister of U.

[ alt="F1 Chitranshi 21-04-21 Savita D10" src="//storage.googleapis.com/tb-img/production/21/04/F1_Chitranshi_21-04-21_Savita_D10.png" style="width: 138px; height: 129px;">

Clearly, X is the mother of U.

3) X ∆ Z © K € Y * U → X is the mother of Z, Z is the sister of K, K is the brother of Y, Y is the father of U.

[ alt="F1 Chitranshi 21-04-21 Savita D11" src="//storage.googleapis.com/tb-img/production/21/04/F1_Chitranshi_21-04-21_Savita_D11.png" style="width: 192px; height: 176px;">

Clearly, X is the grandmother of U.

4) None of these → False as option 2 gives the desired answer.

Hence, 'P € X ∆ O © U' is the correct answer.

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