Final answer:
The probability that a randomly selected song had 501-1,000 plays or was rock is 1.
Step-by-step explanation:
To calculate the probability that a randomly selected song had 501-1,000 plays or was rock, you need to find the number of songs that fall into each category. From the information given, we know that there are 3 Country Rock songs and 2 songs with 501-1,000 plays. To find the probability, divide the number of songs that fall into the desired category by the total number of songs. So, the probability is (3+2)/5 = 5/5 = 1.