Question: In a group of 100 people, 60 like coffee, 40 like tea, and 20 like both. How many people like either coffee or tea?

Options:

1. 80
2. 60
3. 40
4. 100

Correct Answer: 80

Solution:

To find the number of people who like either coffee or tea, use the formula: (Coffee + Tea - Both) = (60 + 40 - 20) = 80.