If  A = {1,3,5,6,7,9} and B = {2,4,5,6,10} be any two sets, then A-B is

a.
{1,3,5,7,9}

b.
{1,6,7,9}

c.
{1,3,7,9}

d.
{1,3,5,6,7,9,10}



The operation \( A - B \) (read as "A minus B") refers to the **set difference**, which is the set of elements that are in \( A \) but **not** in \( B \).

Given:
- \( A = \{1, 3, 5, 6, 7, 9\} \)
- \( B = \{2, 4, 5, 6, 10\} \)

We remove from set \( A \) all elements that are also in set \( B \):
- Elements in \( A \) that are also in \( B \): \( 5, 6 \)

So, the set difference \( A - B \) is:
\[
A - B = \{1, 3, 7, 9\}
\]

Thus, the correct answer is:

**c. \( \{1, 3, 7, 9\} \)**

Would you like further explanation or details?

### Relative Questions:
1. What is the definition of the union of two sets?
2. How do you find the intersection of two sets?
3. What is the symmetric difference between two sets?
4. How does the complement of a set work?
5. How would \( B - A \) be calculated?

### Tip:
Always remember that set operations like difference, union, and intersection work on the elements of the sets without duplication.

If A = {1,3,5,6,7,9} and B = {2,4,5,6,10} be any two sets, then A-B is:

a. {1,3,5,7,9}
b. {1,6,7,9}
c. {1,3,7,9}
d. {1,3,5,6,7,9,10}

Explore the solution to the set difference A - B, where A = {1,3,5,6,7,9} and B = {2,4,5,6,10}. Understand the concept of set difference and learn how to remove common elements from one set to find A - B = {1,3,7,9}. Suitable for Grades 6-8.

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