In a consumer survey, 60% of those surveyed liked at least one of three products: 1, 2, and 3. 40% of those asked liked product 1, 30% liked product 2, and 20% liked product 3. If 10% of the people in the survey liked all three of the products, what percentage of the survey participants liked more than one of the three products?  Choices: A) 10 B) 15 C) 20 D) 25 E) 30
40 + 30 + 20= 
<gadget id="calculator">40 + 30 + 20</gadget>
<output>90</output>
90   This number includes some people counted twice and some people counted three times.   90 - 60= 
<gadget id="calculator">90 - 60</gadget>
<output>30</output>
30, and this number represents people counted twice or three times.   10% of the people are counted two extra times.   The percentage of people counted one extra time is 30 - 10(2)= 10.   The percentage of people who liked more than one product is 10% + 10% = 20%.   The answer is 20.10  + 10= 
<gadget id="calculator">10  + 10</gadget>
<output>20</output>
20%.   The answer is 20.
<result>C</result>
In a consumer survey, 60% of those surveyed liked at least one of three products: 1, 2, and 3. 40% of those asked liked product 1, 30% liked product 2, and 20% liked product 3. If 10% of the people in the survey liked all three of the products, what percentage of the survey participants liked more than one of the three products?