Answer:
1/6 of the students in Robert's grade have both a sister and a brother.
Explanation:
Let x be the number of total students in Robert's grade.
It is given that In Robert's grade, 1/3 of the students have a sister.
Number of students have a sister = 
Of the students who have a sister, 1/2 also have a brother.
Number of students have both a sister and a brother = 
We need to find the fraction of the students in Robert's grade have both a sister and a brother.
Therefore, 1/6 of the students in Robert's grade have both a sister and a brother.
Answer:
D
The northern European plain
The progressive accomplishments of the early 20th century in order are:
- Wisconsin Governor Robert La Follette initiated state Progressive reforms, commonly referred to as the "Wisconsin Idea."
- Congress passed the Pure Food and Drug Act.
- The Seventeenth Amendment was added to the Constitution, providing for the direct election of senators.
- The Clayton Act was passed.
<h3>What happened with progressivism in the early 20th century?</h3>
When he was governor of Wisconsin up to 1905, Robert La Follette initiated the "Wisconsin Idea" which was meant to improve the way people in Wisconsin lived.
Congress then passed the Pure Food and Drug Act in 1906 after pressure to clean up the food production industry. The 17th Amendment was ratified in 1912 and reduced the dependence of Senators on State legislators.
Finally, the Clayton Act was passed in 1914 to reduce ant-competitive behavior.
Find out more on the Clayton Act at brainly.com/question/17083594.
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According to the self-serving bias, we tend to attribute our successes to skill and our losses to chance.<span> The self-serving bias is a cognitive bias that causes a person to view their own actions favorably.</span>
<span>Example for self-serving bias is the following: Blaming the tree for getting in your way after you crashed the car .
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American political scientist Lucian Pye defined political culture as the composite of basic values, feelings, and knowledge that underlie the political process.
