GATE 2017 GENERAL APTITUDE LOGICAL REASONING BLOOD RELATIONSHIP EC ECE SET 2

Question

Comments

is it option D

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Yes .. can you please explain the question in detail?

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https://gateoverflow.in/313510/gate2017-ec-2-ga-7

https://gateoverflow.in/139221/gate-ece-2017

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• X–Y couple → children = P, Q
  So Family 1 = X (parent), Y (parent), P, Q

• P has a daughter S
  → S = child of P

• Z is grandfather of S → matlab Z = P ka father / father-in-law
  But since P already X–Y ke child hai, to Z P ka father-in-law banega (kyunki X–Y already fixed hai).
  → Matlab P ki wife R hogi aur R ka father Z.

• Z–W couple → unka child = R
  So Family 2 = Z (grandfather), W (grandmother), R (daughter)

Answer 1

Guven Z is Grand Father Of S This can be happened only if P is married to R or Q is married to R

 A)X is mother in law of R  ( as Gender is not given so X can be mother in law of R)  --------- May be True

B)P and R are not married to each other (We can't say whether PR are married or QR are married since S is grand Daughter of Z)

   so Option B May be True

C) P is Son of X and Y ( as P gender is not given, P can be son) ------ May be True

D) Q can't Married to R ( Q May Marry R if Q and R are Opposite genders ) ----- This is false

So Option D

Comments

But Z is grandfather of S who is Daughter of P.. this means that P and R married

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Ya even if QR married then S becomes daughter or niece to Q then also Z becomes grandfather to S

Answer 2

The answer should be B)

“P and R are not married to each other” must be false.

“Z is the grandfather of the daughter S of P” → This means P is married and has a daughter. P and Q cant be married because they are siblings. X, Y, W and Z are all married. This leaves only R.

Q cannot marry X, Y, W and Z because they are all married. Q cannot marry P because they are siblings. Q also cannot be married to R because Z is the grandfather of S and S is daughter of P. If R was married to Q then Z will not be a grandfather to S.

Comments

No you are wrong Correct answer is D according to GATE 2017 official ans key by IIT Roorkee

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Explain the reason then

Answer 3

Clearly, for Z to be grandfather of S,

P and R needs to be married which contradicts option (B) given above.

Also no person in the list has married twice or more.

Hence, option (B) should be ticked.

Answer 4

• X–Y couple → children = P, Q
  So Family 1 = X (parent), Y (parent), P, Q

• P has a daughter S
  → S = child of P

• Z is grandfather of S → matlab Z = P ka father / father-in-law
  But since P already X–Y ke child hai, to Z P ka father-in-law banega (kyunki X–Y already fixed hai).
  → Matlab P ki wife R hogi aur R ka father Z.

• Z–W couple → unka child = R
  So Family 2 = Z (grandfather), W (grandmother), R (daughter)