Question

P, Q, R, S, T and U including three boys and three girls are top six rank holders of a class; from top rank 1 to bottom rank 6. P is just after T. Only two persons are behind U in which one is a boy and one is a girl. Rank 4 holder is a boy. R is just ahead of U. The person who got the rank 6 is a boy. S is a girl. T is a boy. Which combination of person-rank-gender is NOT correct?

• A. T : Rank 1 : Boy
• B. R : Rank 2 : Girl
• C. Q : Rank 6 : Boy
• D. S : Rank 5 : Girl

Answer 1

Answer:

B. R : Rank 2 : Girl

Solution:

According to the given information :

P, Q, R, S, T and U including three boys and three girls are top six rank holders of a class, from top rank 1 to bottom rank 6.

• Only two persons are behind U in which one is a boy and one is a girl.

• R is just ahead of U.

• Rank 4 holder is a boy.

• P is just after T.

​There are two possibilities:

Rank	Case 1		Case 2
1	T
2	P
3	R		R
4	U	B	U	B
5		G/B	T	G/B
6		B/G	P	B/G

 

• T is a boy. 

• The person who got the rank 6 is a boy.

Rank	Case 1		Case 2
1	T	Boy
2	P
3	R		R
4	U	Boy	U	Boy
5		Girl	T	Boy
6		Boy	P	Girl

 

Here, Case 2 will get eliminated as it does not follow the condition that rank 6 is boy.

• S is a girl. 

Rank	Case 1
1	T	Boy
2	P
3	R
4	U	Boy
5	S	Girl
6		Boy

 

Therefore, the final arrangement is :

Rank	Person	Gender
1	T	Boy
2	P	Girl
3	R	Girl
4	U	Boy
5	S	Girl
6	Q	Boy

 

So, it is clear from the above arrangement that the rank of R is 3.

Thus, 'R : Rank 2 : Girl' is not correct.

Hence, the correct answer is "R : Rank 2 : Girl".