In any triangle, the longest side is always opposite to the largest angle.
In this case, the longest the side is the side opposed to 80°
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
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.6985 is the z score for 0.52. which would be converted into 69.85%, if needed as well.
Answer:
I would say about 42% or so luvs hope I helped