Answer and Step-by-step explanation:
In probability, events are dependent when the probability of the first event ocurring influences the outcome of the second event.
a. For events A and B, after ripping one page, it is destroyed, so the total number of pages changed. Therefore, events A and B are dependent.
b. To find the probability of both events happening, first, determine the probabilities of each event:
P(A) =

P(B) =

P(A and B) =

P(A and B) =

Probability of A and B occur is 0.12% or
.