How many investors had invested only in stocks?

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Of the 440 people who invested in stocks, 211 had invested in both stocks and bonds. That means the number of people investing in stocks alone is as follows.
n(S only)	 = 	440 −

=

We are given that:

- 440 people invested in stocks.
- 211 people invested in both stocks and bonds.

The number of people who invested only in stocks can be found by subtracting those who invested in both stocks and bonds from the total stock investors.

\[
n(S \text{ only}) = 440 - 211 = 229
\]

So, **229 people invested only in stocks**.

Would you like further clarification or details on this? Here are some related questions:

1. How would you calculate the number of people who invested only in bonds?
2. What is the total number of people who invested in either stocks or bonds (or both)?
3. How would you represent this problem using a Venn diagram?
4. What percentage of the stock investors also invested in bonds?
5. How would this calculation change if we added a third investment option, such as real estate?

**Tip:** When solving set problems like this, using a Venn diagram can help visualize the relationships between different groups.

How many investors had invested only in stocks?

Find out how to determine the number of investors who invested only in stocks, using basic set theory and subtraction. Of the 440 total stock investors, 211 also invested in bonds. This step-by-step solution is perfect for students in Grades 5-7.

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