sat suite question viewer
An insurance company offers a series of three information sessions. 1,250 people attended the first information session. of the people who attended the first information session attended the second information session, and of the people who attended the first and second information sessions attended the third information session. How many people attended all three information sessions?
Explanation
The correct answer is . It’s given that people attended the first information session, and that of the people who attended the first information session attended the second information session. Therefore, the number of people who attended the first and second information sessions can be found by calculating of , which is equal to , or . It’s also given that of the people who attended the first and second information sessions attended the third information session. Since people attended the first and second information sessions, the number of people who attended the first, second, and third information sessions can be found by calculating of , which is equal to , or . Therefore, people attended all three information sessions.