61.
The Adding Up Theorem under constant returns to scale holds when the factors of production are paid according to their

63.
Assertion (A) As the proportion of one variable factor in a combination with fixed factor is increased, after a point the marginal product of the factor will diminish.
Reason (R) Beyond the level of optimum combination of inputs leads to this.

64.
If a firm operates in a perfectly competitive market, then it will most likely

66.
The formula for calculating arc elasticity is

67.
In a two-input situation (K and L), if one of the inputs, say L, is available free of cost to a producer, then the factor price curve or the producer's budget curve is

68.
The demand curve is . . . . . . . . representation of a demand schedule, demand curve slopes . . . . . . . . ward from left to right.

70.
In monopolistic competition, a firm is in long run equilibrium