JNU 2012 Answer Key

[Amit Goyal]

1. (c) less than 2%
2. (a) has a mean 0 and a standard deviation of 1
3. (a) indicates a one-tailed test with a rejection area in the right tail
4. (b) Increase (Reason: Since time deposits have become less liquid, people will hold more money for transactions)
5. (d) A non-resident Indian visiting India purchases rice, goes back to his country of residence, makes a dosa and then sells it to his neighbor.
6. (d) (4, 4) or (4, 0) or (-2, 2)
7. (a) The other corners are (1, 1, 0), (1, 0, 1), (0, 1, 1) and (1, 1, 1)
8. (d) None of the above
9. (a) The volume of the cube is 1
10.(b) The area of the cube is 6
11.(a) 0.10
12.(d) 1.10
13.(d) None of the above
14.(c) 16.16
15.(c) wages should rise and rents should fall in country A
16.(c) $2500 and 2000 computers
17.(b) 1600 computers, increase, decrease
18.(b) increase, decrease (Note: We are asked to compare quota situation with no trade situation)
19.(b) f'(x) > 0
20.(d) a=b
21. (d) None of the above
22. (a) S=G
23. (c) 4
24. (b) 2.5
25. (d) None of the above
26. (a) 0.5
27. (b) 1-(1-p(1))(1-p(2))(1-p(3))
28. (c) 1/2
29. (c) Situation (i) is at least as likely as situation (ii)
30. (d) None of the above
31. (b) 72 x 0.00001
32. (d) None of the above
33. (c) C's weight or E's weight
34. (b) the average of B's weight and E's weight
35. (b) 2
36. (c) greater than unity
37. (a) greater with replacement than without' replacement
38. (c) less than 1/16
39. (c) 76
40. (b) B
41. (d) 0
42. (b) Chemistry
43. (a) P
44. (b) hockey team
45. (a) A
46. (c) more output and has a lower price
47. (b) shorter than
48. (d) None of the above
49. (a) 11 5
50. (b) 6
51. (c) 20
52. (b) 12 years
53. (d) 17
54. (c) 10 meters
55. (d) None of the above (47 days)
56. (b) x = 1.5, y=1.5
57. (a) x = 1, y = 2
58. (d) either x = 2, y = 1 or x = 1, y = 2
59. (b) Output y/2 is produced in plant 1 and output y/2 is produced in plant 2.
60. (a) y = 3
61. (d) None of the above
62. (a) x(1) + x(2)
63. (c) x* = 0 or x* = 1 or f '(x*)=0
64. (c) To prove that f is not a function, it is necessary to demonstrate (i) or (ii)
65. (c) Demonstration of (i) and (ii) is sufficient to prove that f is not a function
66. (a) The range of the surjective function is always equal to its codomain
67. (d) None of the above
68. (a) 0
69. (c) 4
70. (b) After two years
71. (b) After two years
72. (b) After two years
73. (a) Today
74. (a) Today
75. (a) Today
76. (b) 1980-85
77. (d) 1990-95
78. (c) 3
79. (a) 1
80. (d) The substitution effect is negative and there are no income effects
81. (a) The Slutsky equation says that the total change in demand is exactly equal to the sum of the substitution effect and the income effect
82. (a) continuous at all points in the domain but not differentiable at some points in the domain
83. (c) At the optimum, the consumer should consume 50 units of commodity 1 and 50 units of commodity 2
84. (a) the optimum consumption of commodity 1 increases by 1/3 and the optimum consumption of commodity 2 increases by 1/3
85. (d) 0
86. (b) 25
87. (c) x(1) = x(2)
88. (a) 4
89. (b) 2
90. (c) 4
91. (b) 6 (Assuming that the question asks you to determine the tax rate
that implements purchase of exactly two cows that we found in Q 89)
92. (a) Rs. 10
93. (b) 0
94. (d) None of the above
95. (a) -4
96. (a) f(x) has a minimum value but no maximum value
97. (b) 2
98. (b) climate change
99. (c) put hurdles in the way of poverty eradication
100.(d) None of the above

[Mauli]

thanks a lot sir:)

[Sumit]

thanks a ton sir....

[VR]

 Endless Gratitude. Thank You Sir..

[SOBRE]

Ans to ques no six cant be 3 points.. it has to be (4,4).. I mean if i draw it on a 2-d plane other two points dont make sense.. please check

[duck]

Hi Sobre.. :)

option(d) says (4,4) or (4,0) or (-2,2)

So, if fourth point is any of the above three ,then we'll have a parallelogram

[jasir]

Thanks . Really appreciated !

[Ayushya Kaul]

Sir, could you please explain how to solve Q22-26 ?

[sonal]

help m out wd 22-26??

[sakshi]

help me out wid question no. 70 to 79

[sakshi]

sir can u please post 2012 n 2011 sis solutions

[SOURISH]

Sir, what is the probable cut-off marks in JNU Economics entrance exam?

[Shefali]

HOw to solve ques 1?

[Homer Simpson]

For 1, use compound interest formula. Let population of country be 100 and it changes to 120 in 20 years. P= 100, t=20 and A=120.

Find r for this and compare.

[shietal]

for question 6 i have understood how (-2,2) has come. can someone please help me with the other points

[shietal]

can someone please explain q 22-26

[Amit Goyal]

For 22,
C + S = C + G gives us S = G.

For 23,
Let N denotes non worker consumption. And W denotes wages.
Given that total value of output, Y = 200L and wages, W = 150L,
we get W = (3/4) Y and C = N + (3/4) Y
Hence, Y = N + (3/4) Y + G.
Thus, the multiplier is 4.

For 24,
We do the same thing as above except that C = N + 0.8(3/4) Y
Thus, the multiplier is 2.5.

For 25,
We do the same thing as above except that C = N + (3/4) (Y) - G.
Hence, Y = N + (3/4) Y - G + G.
Thus, the multiplier is 0.

For 26,
We again do the same thing as above except that C = N + 0.8((3/4) (Y) - G).
Hence, Y = N + 0.8((3/4) Y - G) + G i.e. Y = N + 0.6 Y + 0.2 G
Thus, the multiplier is 0.5

[deepasna.kalra]

Can somebody please explain QUES 40! The three trucks one thanks.

[deepasna.kalra]

Also please explain the working of QUES 88-92. Thanks

[ViV]

Sol 40
Possible combinations
WWW, WWR, WRW, WRR, RWW, RWR, RRW, RRR
Given the conditions we can see 3 combinations are useful WRR, WRW,RRW. In all 3 cases B always transports R. so (b) is the answer.


Sol for 88-92
it is given that the value of each cow's production is V(n)
for 1 cow it is 22 rs
for 2 cows it is 18+18=36 rs n so on

sol 88. for max profit MR=MC
at n=4 the profit max condition is satisfied (we have to take discrete units)
each cows production value is 12 and mc=11.
(a) is the answer

sol 89. we have to max the difference between TR and TC
for n=1 TR-TC= 22-11=11
for n=2 TR-TC=18+18-22=14
for n=3 TR-TC=15+15+15-33=12
chek for all values of n
so n=2, (b) is the answer

sol 90. in equilibrium 4 cows will be purchased
TR-TC=12*4-11*4= 4 (C) is the answer

sol 91.
at n=1, new TR-TC = 11-t
at n=2, new TR-TC = 14-2t
at n=3, new TR-TC = 12-3t
at n=4, new TR-TC = 4-4t
substitute values of t from the options most of the time TR-TC< 0 so ignore that t and use the next option. so t = 6, (b) is the answer

sol 92. after tax total cost will be 21 per cow so only 1 cow will be purchased. tax revenue is rs 10
so (a) is the answer