GIVEN: 60% people watch Netflix, 72% people watch Amazon prime and 45% watch both of them. Calculation Total people who watch any of them = (People who watch Netflix) + (People who watch Amazon prime) – (People who watch both of them) Let the total number of people in the office be x So, Total number of people who watch any of them = 0.6x + 0.72x – 0.45x = 0.87x Hence, Number of people who do not watch any of them = x – 0.87x = 0.13x Given that 52 people do not watch any of them. So, 0.13x = 52 ⇒ x = 400 ∴ Number of people in the office = 400