The Venn diagram is given below. Then the number of students who have brother and sister will be 6.
<h3>What are sets?</h3>
A set is a group of clearly specified components. The number of items in a finite set is denoted by a curly bracket.
In a class of 20 students:
11 have a brother, 9 have a sister, and 6 have neither.
Then the Venn diagram will be
11 – a + a + 9 – a = 20 – 6
20 – a = 14
a = 6
The Venn diagram is given below.
More about the sets link is given below.
brainly.com/question/8053622
#SPJ1
Answer:
n=5
Step-by-step explanation:
.......................
Any of several graphing calculators are suitable for this. Desmos is a free on-line one that is easy to learn and use.
B
If you need help to visualize it, think of 48 circles. Circle groups of 6 circles. Grouping the circles, is the same as plain dividing 48 by 6 without the pictures.