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QUES 47
If the marginal cost of producing 4th unit is greater than the marginal cost of producing 3rd unit, then it follows that: a) the average cost of producing 4 units must be greater than the average cost of producing 3 units b) the average cost of producing 4 units must be less than the average cost of producing 3 units c) the average cost of producing 4 units must be equal to the average cost of producing 3 units d) None of the above Answer-d QUES 48 ![]() Answer-d QUES 49 ![]() Answer- QUES 50 ![]() Answer-c QUES 51 Suppose the price elasticity of demand for good X is 0.2 If the price of X rises by 2.8%, what effect will it have on the total expenditure on good X? a) Expenditure on X will fall by 5.6% b) Expenditure on X will rise by 5.6% c) Expenditure on X will rise by 2.2% d) Expenditure on X will fall by 2.2% Answer-c QUES 52 ![]() Answer-c QUES 53 The probability distribution of a random variable X is given in the table below: ![]() The mean and variance of X are respectively: a) 2;2 b) 2; 1.4142 c) 1.37; 1.2731 d) None of the above Answer-c QUES 54 In a certain country telephone numbers have 8 digits. The first two digits are the area code and are the same within a given area. The last 6 digits are the local number and cannot begin with 0. How many different telephone numbers are possible within a given area code in this country? a) (10)^6 b) 9^6 c) 900000 d) None of the above Answer-c QUES 55 ![]() Answer-d QUES 56 ![]() Answer-b |
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Any idea about 49??
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49. Option 2 is better than Option 1.
Consider the future values- Option 1- 112 Option 2- 56 + 55*(1.03) = 112.65 |
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In reply to this post by Arushi :))
I think option a is better..
option 1:Future value=112*1.12=125.44 option 2:Future value=55*(1.12)^9/12 + 56*1.12=122.59
MA Economics
DSE 2014-16 |
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For investments arent present values to be compared?
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In reply to this post by Arushi :))
Explanation for ques 47 ?
"Once you eliminate the impossible, whatever remains, no matter how improbable, must be the truth."
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This post was updated on Mar 24, 2014; 7:42am.
In reply to this post by Arushi :))
For question 49 , option 2 is better
Take option 1 - Rs 112 , and calculate principal amount by SI formula . P = 100 Come to the second option , SI for 9 months = 100 * .12 * 9/12 = 9 So after 9 months you get 109 amount. However you have received just 55 and have kept Rs 54 ( 109-55=54 ) in the bank. So calculate SI for 3 months = 54* 12/100*3/12 = 1.62 So in total you should get , 54+1.62 , but you are getting 56 . So this option is more feasible.
"Once you eliminate the impossible, whatever remains, no matter how improbable, must be the truth."
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@ anjali
for 47 ![]() I have made two situations where MC of 4th unit is greater than MC of 3rd unit. But in the first situation AC of 4 units < AC of 3 units. In the second situation ( after the minimum point of AC curve) both the situations are possible, They could be equal, or AC of 4 units > AC of 3 units depending on how exactly is the AC curve So no conclusion can be made. Hence, i chose d. |
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Okay so you mean that since we do not know the minimum point , we can make no conclusion . Is that so ?
"Once you eliminate the impossible, whatever remains, no matter how improbable, must be the truth."
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yes , because we just know that we are on upward sloping portion of MC curve.
We don't have any knowledge about min point of AC curve . And thus we can't say anything about Average costs. |
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In reply to this post by RajEco
So Im getting the same answer as you Raj, but this link has Amit sir's answer key for the paper.. and it says (d) for some reason.. No idea why..
Link: http://discussion-forum.2150183.n2.nabble.com/JNU-2011-Answer-Key-td7563304.html#a7566480 |
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In reply to this post by Arushi :))
plz reply qno.51 and 54
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In reply to this post by Arushi :))
qno 56-a
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For question 49 option 2 is better than option 1 but that can only be verified by a scientific calculator because for finding the future value/present value of 55,the quarterly interest rate q,must be calculated as follows
(1+q/4)^4=1.12 which gives q=11.494% approx. so unless a scientific calculator is allowed we can't arrive at a conclusion..hence option d |
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49 (d) because there is no info regarding whether he is investing Rs. 55 for 3 months or not.
51 (b) or (c) because elasticity<1 (Inelastic) but I don't know the Exact number 2.2% or 5.6% |
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In reply to this post by Arushi :))
Naah naah quest 49 is b for sure...
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Q.51
ed=.2 change in Q=(-.56) TR=P.Q take log both side logTR=logp+logQ total differentiate so, total expenditure=change in P+ change in Q =2.8+(-.56) =2.2 |
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