What object of scientific progress helped to end World War ll?
1 answer:
You might be interested in
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.