Q-1 Find the error in each of the following statements:
(a). The probabilities that an automobile salesperson will sell 0, 1, 2, 3 cars on any given day in February are, respectively, 0.19, 0.38, 0.29, and 0.15.
(b). The probability that it will rain tomorrow is 0.40 and the probability that it will not rain tomorrow is 0.52.
(c). The probabilities that a printer will make 0, 1, 2, 3, or 4 or more mistakes in setting a document are, respectively, 0.19, 0.34, -0.25, 0.43, and 0.29.
(d). On a single draw from a deck of playing cards the probability of selecting a heart is 1/4, the probability of selecting a black card is 1/2, and the probability of selecting both a heart and a black card is 1/8.

What do you think?

a, figures should be consistently diminutive
b, figures should add up to 1.0
c, -0.25? What does that mean
d, Black hearts only exist in Nazi pigdogs.

yes.
yes.
you're right. Can't have a negative probability.
... haha