Answer: 0.209
Explanation:
Imagine this: Renee and Thomas live at the beach and collect seashells. The number of shells Renee collects on any given day, R, is approximately Normal with a mean of 58.2 shells and a standard deviation of 12.8 shells. The number of shells Thomas collects on any given day, T, is approximately Normal with a mean of 47.9 shells and a standard deviation of 11.5 shells. Assume the two random variables are independent of each other.
What is the probability that on a randomly selected day the total number of shells collected by Renee and Thomas is 120 or more? 0.209.