The _________ is the point at which the total revenue equals total cost.
(a) break-even point
(b) fixed cost solution
(c) optimal profit point
(d) zero-profit solution
Probabilities for all the possible values of a discrete random variable:
(a) may be greater than one.
(b) may be negative on some occasions.
(c) must sum up to one.
(d) are represented by the area under the curve