SAT Question 1fc4f47b: Probability And Conditional Probability answer and explanation with Desmos solution

Choice D is correct. It's given that at a movie theater, there are a total of $350$ customers and that each customer is located in either theater A, theater B, or theater C. If the probability of selecting a customer in theater A is $0.48$, then $\left(0.48\right)\left(350\right)$, or $168$, customers are located in theater A. If the probability of selecting a customer in theater B is $0.24$, then $\left(0.24\right)\left(350\right)$, or $84$, customers are located in theater B. It follows that there are $168+84$, or $252$, customers in theater A and theater B. Therefore, there are $350-252$, or $98$, customers in theater C.