JNU ECOM 2010 Ques 21-30

[Arushi :))]

QUES21.
Satish is very conscious about the food he eats. He only eats rotis & dal ; a cup of dal costs Rs.2 while each roti costs Re.1 and  satish decides to spend only Rs.13 per day on food. Also he decides to consume 5500 calories a day ; he has been told that each roti has 1000 calories while each cup of dal has 500 calories. He spends his entire money allocated on foods. Then:
a.he consumes 3 rotis & 5 cups of dal per day
b.he consumes no more than 3 rotis per day
c.he consumes no more than 5 cups of dal per day
d.he consumes 5 rotis & 4 cups of dal per day
ANS part a
QUES22.
A monopolist has a demand curve with constant price elasticity with absolute value 4. The monopolist charges a price of 60 per unit of output. What is the marginal cost at this level of output?
a.23.5
b.136
c.45
d.54
ANS part c
QUES23
In a two good world a consumers utility function is given by U(x,y)= max{x,y}
The price of both goods is Rs2 and consumer's income is Rs100. His optimal consumption bundle is:
a.either (i) 0 units of x & 50 units of y or (ii) 50 units of x & 0 units of y
b.50 units of x & 50 units of y
c.25 units of x & 25 units of y
d.None of the above
ANS part a
QUES24
A firm has a production function Q=AK^0.5*L^1.8 where A>0. such a production function exhibits:
a.decreasing returns to scale & diminishing marginal product for factor K
b.increasing returns to scale & diminishing marginal product for factor K
c.decreasing returns to scale & increasing marginal product for factor K
d.constant returns to scale & increasing marginal product for factor L
ANS part b
QUES25
The short run supply curve for a competitive firm is given by:
a.the marginal cost curve of the firm.
b.the marginal cost curve above the average cost curve.
c.the marginal cost curve above the average variable cost curve.
d.the upward sloping part of the marginal cost curve.
ANS part c
QUES26
If X1,X2,.............,Xn are non-negative real numbers, then their
a. Arithmetic mean is less than or equal to geometric mean
b. Geometric mean is less than or equal to arithmetic mean
c. Arithmetic mean = 0.5 ( geometric mean)
d. There is no fixed relationship between arithmetic mean & geometric mean.
ANS part b
QUES27
If (x/b)>(b/c), then
a. xc>b^2
b. xc< b^2
c. xc= b^2
d. cannot say anything about relation between x, b & c
ANS part d
QUES28
Let f(x)= (log(x))/x where 0<x<1, Then for all x such that 0<x<1
a. f'(x) <0
b. f'(x) >0
c. f'(x) > 0, if 0<x<0.75 and f'(x)<0 , if 0.75<x<1
d. f'(x) < 0, if 0<x<0.75 and f'(x)>0 , if 0.75<x<1
<b>ANS part b      
QUES29
Given the two numbers x = ( 3x7^0.5+ 4x7^0.5 )^2 and y=343, which of the following must be true?
a. x>y
b. y>x
c. x=y
d. x=y/2
ANS part c
QUES30
Beena's average score after 8 class tests is 84. In her first 7 class tests, Beena's average score was 85. In her last class test, Beena has scored
a.82
b.87
c.77
d. None of the above
ANS part c

[Arushi :))]

Confusion for 27

[Arushi :))]

soniaaa n kangkan.... guys match the ans .

[kangkan]

Hi..Matches my answers

Question 27.

let x=100,b=2,c=1

Now X/b>b/c(100/2>2/1) and xc>b^2

Now let x=-100,b=-2 and c=1

Even now ,(x/b)>b/c( -100/-2>-2/1

but now xc<B^2

Hence we cant say anything

[SoniaKapoor]

matches mine too :))