Final answer:
To find the probability that a customer rents at most two DVDs, we need to sum up the probabilities of renting zero, one, and two DVDs. The probability of renting at most two DVDs is 0.8.
Step-by-step explanation:
To find the probability that a customer rents at most two DVDs, we need to sum up the probabilities of renting zero, one, and two DVDs.
From the given information, we can see that the probability of renting zero DVDs is 0.1, the probability of renting one DVD is 0.3, and the probability of renting two DVDs is 0.4.
To find the probability of renting at most two DVDs, we add these probabilities together: 0.1 + 0.3 + 0.4 = 0.8.