The intersection of S and B represents the individuals who have both a sister and a brother.
The region outside both circles represents those who have neither a sister nor a brother.
How to complete a Venn diagram?
S = people who have a sister.
B = people who have a brother.
12 people have a sister;
we put 12 in the intersection of S and B.
15 people have a brother;
we put 15 in the intersection of S and B.
11 people do not have a sister nor a brother;
we put 11 in the region outside both circles.
Therefore, numbers 12, 15, and 11 represent the number of people in each category.
Complete question:
In a group of 30 people, 12 have a sister 15 have a brother 11 do not have a sister nor a brother Complete the Venn diagram to show this information. = group of 30 people. S = people who have a sister. B = people who have a brother.