In a class of 40 students, 20 students like Mathematics, 15 like Science, and 10 students like both Mathematics and Science. How many students like either Mathematics or Science?

A survey in a school found that 100 students play football, 70 play basketball, and 40 play both football and basketball. How many students play only one of these sports?

In a school event, 150 students participated in singing, 200 students participated in dancing, and 50 students participated in both singing and dancing. How many students participated in at least one of these activities?

Out of 60 students in a class, 25 students play volleyball, 30 students play soccer, and 10 students play both volleyball and soccer. How many students do not play either volleyball or soccer?

A survey was conducted in a neighborhood to find out how many people prefer tea over coffee. Out of 120 people surveyed, 70 people preferred tea, 60 people preferred coffee, and 30 people enjoyed both. How many people did not prefer either tea or coffee?

During a book fair, 80 visitors were interested in fiction, 120 were interested in non-fiction, and 40 were interested in both. How many visitors were interested in either fiction or non-fiction?

In a school survey, 90 students said they use Android phones, 75 students said they use iPhones, and 30 students said they use both. How many students use either Android phones or iPhones?

In a language class, 25 students are learning French, 20 students are learning Spanish, and 10 students are enrolled in both languages. How many students are enrolled in at least one of the language courses?

In a high school, 150 students are enrolled in mathematics, 200 students are enrolled in science, and 50 students are enrolled in both subjects. How many students are enrolled in either mathematics or science?

A survey in a village shows that 80 households have a dog, 100 households have a cat, and 30 households have both a dog and a cat. How many households have either a dog or a cat?