John and Beth plan to visit a bookstore. Based on their previous visits to this bookstore, the probability distributions for the numbe of'boks they will buy is given below. Number of books John wi buy Probability 0.50 0.100.250.15 Number ofbooks Beth will buy 023 Probability 025 0.45 0.10 020 Assuming that John and Beth mnke their decisions to purchase books independently, what is the probability that a total of 0 books are purchased? a) 0.8750 b)0.6250 c) 0.2500d) 0.1250