In a survey, 40 people like tea, 30 like coffee, and 10 like both. How many peop

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Question: In a survey, 40 people like tea, 30 like coffee, and 10 like both. How many people like only tea?

Options:

Correct Answer: 20

Solution:

To find the number of people who like only tea, we subtract those who like both from those who like tea: 40 - 10 = 30.

In a survey, 40 people like tea, 30 like coffee, and 10 like both. How many people like only tea?

In a survey, 40 people like tea, 30 like coffee, and 10 like both. How many people like only tea?

Step 1: Identify the number of people who like tea. This is given as 40.
Step 2: Identify the number of people who like both tea and coffee. This is given as 10.
Step 3: To find the number of people who like only tea, subtract the number of people who like both from the number of people who like tea.
Step 4: Perform the subtraction: 40 (people who like tea) - 10 (people who like both) = 30.
Step 5: The result, 30, is the number of people who like only tea.

Set Theory – Understanding the relationships between different groups, specifically using the principle of inclusion-exclusion.
Basic Arithmetic – Performing simple subtraction to find the number of individuals in a specific category.