6. In a survey of 100 people, 73 owned only stocks. Six of the people invested in both stocks and bonds. How many people owned bonds only?

This is what I did:
73+6=79
100-79=21

You don't indicate whether the remaining persons own bonds or neither bonds or stocks. If the former, I agree.

73+6=79

100-79=21

To find the number of people who owned bonds only, you need to subtract the number of people who owned both stocks and bonds (6) from the total number of people surveyed (100).

So, the calculation would be:

100 - 6 = 94

Therefore, there were 94 people who owned either stocks only or bonds only.

To find out how many people owned bonds only, you need to subtract the number of people who owned stocks only (73) from the total number of people who either owned stocks or bonds.

So, the calculation would be:

94 - 73 = 21

Hence, 21 people owned bonds only, according to your given information.