JNU 2013 SSS DOUBTS

[ViV]

Answer Question Nos. 10-15 on the basis of the following information:
An exclusive club is trying very hard to pick its members from the social elite. An exact election mechanism has been agreed upon that will ensure the entrance of only the most suave members from the group A, B, C, D, E; F, G and H. Being 'in' or `out' of the club is determined by the following rules :
If A is in, then G is out.
If H is out, then B is in.
If D is out, then E is out.
If H is in, then C is in.
If B is out, then G and D are out.

10. Which of the following is a complete group of people who could be in?
(a) A, F, G
(b) F, G, H, C, E, D
(c) E,D,H,C,B
(d) B,F,G,D,A

11. If B is out , then who must be in?
(a) A
(b) C
(c) D
(d) E

12. If E and G are in the club, then what other two people must also be in the club?
(a) B, A
(b) G, H
(c) H, D
(d) D, B

13. If B and D are out of the club, then which of the following must be true?
(a) At least two people are in the club
(b) At least three people are in the club
(c) At most four people are out of the club
(d) Exactly three people are out of the club

14. If seven people are in the club , then who could be out?
(a) A
(b) B
(c) E
(d) C

15. Who could be the only person in the club?
(a) A
(b) B
(c) C
(d) F

[Granpa Simpson]

10) d
11) a
12) d
13) a
14) a
15) d

[ViV]

Could you show your working..
coz in 10th I am getting (b).
You are telling (d). If you look at 1st condition A is in, then G is out. So option (d) doesn't satisfy the conditions stated.

[Granpa Simpson]

Sorry viv ur right..actually i misstated "d" as "b"..and u check the other ones too...!!!!

[Granpa Simpson]

11) if B is out then G and D are out..which implies A is in.
12) If G is in the club then B has to be in..so B,A and B,D can be possible..but if G is in then A is out, so we rule out B,A and hence B,D.

[Granpa Simpson]

13) if B & D are out then E & G are also out...also H cannot be out because that implies B is in which is a contradiction, hence H is in and hence C is in...also A can be out of the group..also F can be out..so there can be atleast 2 members in the club..hence a.

[ViV]

11th (a) or (b)
12th is right
13th (c) B, D, G, E are out
14th
15th (d)

[Granpa Simpson]

15) The only group in the club can the one whose presence or absence does not depend on anybody else...hence f is the one..option d

[Granpa Simpson]

for 13) yes i agree that B, G, E and D are out..also it may be the case that A is also out and F too...??isnt it so?? but H cannot be out if you check because if H is out then B is in which is a contradiction..so there can be atleast two people in the club..because we dont know weder F and A are present or absent..!!!

[ViV]

10th (b)
11th (a)
12th (d)
13th (a) agree with ur points
14th  
15th (d)

Plz Explain 14th...

[Granpa Simpson]

And for 11) a cannot be the answer because if A is in then G is out so A and G cannot be in the same group..so b is the answer..!!!

[Granpa Simpson]

for 14) B & C cannot be the answers they cannot be absent alone as B is out implies D and G are also out..also if C is out then H cannot be in because "if H is in then C is also in"..there is a confusion between E and A..!!!

[ViV]

Hmm.
Ok do the next one...

Answer Question Nos. 16-21 on the basis of the following information:
A number of species faced extinction during the Mesozoic era. Species R, S, T, U, V, W and X were species that all became extinct during this era and scientists have determined that their extinction occurred based on the following constraints.

W became extinct before X.
U became extinct after T.
S became extinct before T.
X became extinct before U.
V became extinct after U.
S became extinct before W.
R became extinct before S.

16. Which of the following species were the last two to go extinct?
(a) X, V
(b) T, U
(c) X, U
(d) U, V

17. Which of the following species could have been the fourth one to go extinct?
(a) S
(b) V
(c) W
(d) R

18. Which is the smallest number of species that could have gone extinct before T?
(a) Two
(b) Three
(c) Four
(d) Five

19. Which of the following must be true if X went extinct after T?
(a) Three species went extinct before T
(b) Three species went extinct after T
(c) Four species went extinct before T
(d) At least three species went extinct after T

20. How many possible orders are there for the species' extinction pattern?
(a) One
(b) Two
(c) Three
(d) Four

21. If the constraints were changed and X were not required to become extinct before U,
then which of the following is a possible order for the species ' extinction?
(a) W, R, S, T, U, X, V
(b) R, S, X, W, T, U, V
(c) R, X, S, W, T, U, V
(d) R, S, T, U, V, W, X

[Granpa Simpson]

in ascending order of period of extinction following can be the series:
1) R,S,W,X,T,U,V.
2) R,S,W,T,X,U,V.
3) R,S,T,W,X,U,V.
Thus
16) d.
17) c.
18) a.
19) c.
20) c.
21) d.
       

[ViV]

Thank u so much DuDe!!!

[ViV]

Please help me in doing these questions...

38. For the countries in the European Union that share a common currency, the euro,
which of the following is correct?
(a) It is impossible to have different real exchange rates from one another
(b) It is possible to have real exchange rates that are different from one another
(c) The nominal and real exchange rates will always vary according to capital flows
(d) The concept of real exchange rate is not relevant

58. Consider two economies (1 and 2) where in equilibrium, the level of aggregate
income (Y) is the sum of aggregate investment expenditure (I) and aggregate
consumption expenditure (C). I is determined autonomously of Y and its value in
economy 1 is double that in economy 2. If the marginal propensity to save in economy 1
is half that in economy 2 for all values of Y, then the equilibrium value of Y - C in
economy 1 is
(a) double that in economy 2
(b) half that in economy 2
(c) the same as that in economy 2
(d) None of the above

63. Which of the following conditions is not necessary for ordinary least squares to be the
best unbiased linear estimator (BLUE)?
(a) All errors are normally distributed
(b) All errors are independent and uncorrelated to each other
(c) All errors have expectation zero
(d) All errors have the same variance

69. In 1990-91, the price index of agricultural commodities was 200 and that of
manufactured products 150. In a year's time both the indices increased by 15 (i.e., the
price index of agricultural commodities became 215 and that of manufactured
products 165). Consequently, the terms of trade between agriculture and industry
(a) moved in favour of agriculture
(b) moved in favour of industry
(c) remained unchanged
(d) None of the above
       
70. Populations of two species A and B at time 0 are equal. If the instantaneous rates
of growth of populations of species A and B are u and u + 1 respectively, u > 0, then
at time 1 the population of species B would be
(a) twice the population of species A
(b) log 10 times of the population of species A
(c) e" times the population of species A
(d) e times the population of species A

75. The market demand function for a commodity is given as D(p) = 1 / p; where p is the
price of the commodity. Which of the following statements about the market demand
curve is correct?
(a) The price elasticity of demand for this commodity is different at different points on
the demand curve and it varies from 0 to 1
(b) The price elasticity of demand for this commodity is different at different points
on the demand curve and it varies from 0 to -
(c) The price elasticity of demand for this commodity is equal to 1 at any point on
the demand curve
(d) None of the above

83. A theorem states that if P then Q'. From empirical observations it is known that P is
false. Therefore it can be inferred that
(a) Q is false
(b) Q is true
(c) the theorem If P then Q' is false
(d) None of the above

[Dreyfus]

38...its possible to have different real exchange rate...as nominal exchange rate will remain same but due to different prices in different countries its possible for countries to have different real exchange rate inspite of sharing same currency....

[Dreyfus]

For 70th....its d....e times the population of A at period 1
And for 83...I think it should be d...as Q may be false or may be true

[Granpa Simpson]

38) b.
58) c.
69) c.
75) c.

[ViV]

@Subhayu: Could you show me the workings also.
I am getting different answers for all the questions.