1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
sergey [27]
2 years ago
7

If someone could help me answer this and possibly give me a step-by-step for future reference that'd be great thanks.

Mathematics
1 answer:
andreyandreev [35.5K]2 years ago
6 0

Answer:

Let's look at the Venn diagram and the data we have:

There are 12 pupils

9 have a brother

7 have a sister

2 have neither.

Now let's look at the diagram.

We know that the circle B represents the pupils who have a brother

Circle S represents the students that have a sister.

Then the intersection of the circles, represents the number of students that have both.

And the space outside the circles represents the pupils that do not have a brother nor a sister.

Then the first thing we can complete is a 2 in the bottom left corner, because we already know that there are 2 pupils that do not have brothers nor sisters.

Now let's find the number of students that have both, brothers and sisters:

There are 12 pupils.

9 have a brother

7 have a sister

2 have neither

if we add that, we get:

9 + 7 + 2 = 18

This is larger than 12, this means that we are counting some of the students more than once.

If X is the number of students that we are counting twice, we should have:

18 - X  = 12

18 -12 = X = 6

There are 6 students who we are counting twice, and this happens because these 6 students have a brother and a sister.

Then in the intersection of both circles we should put a 6.

At the left of that (in the part that we have only circle B) we need to write the number of students that only have a brother, this is the number of students that have a brother minus the number of pupils that have a brother and a sister, this is:

9 - 6 = 3

We need to write a 3 in that square.

And in the last square (the one that is only one circle S) we need to write the number of pupils that only have a sister, this is calculated in the same way than before, this is:

7 - 6 = 1

We need to write a 1 in the rightmost square.  

You might be interested in
Can you help me with the answer for these questions please
marishachu [46]
23. 90
24. Games 1-5 had an average of 8 and games 6-10 had an average of 11, so games 6-10 had an average greater than games 1-5 by 3 points.
25. 168
3 0
2 years ago
Read 2 more answers
How to solve a quadratic equation that does not factor?
svlad2 [7]
Use the formula or complete the square.
The zeroes of the quadratic can be real and rational; real and irrational; complex conjugates.
If the quadratic is ax²+bx+c, x=(-b+√b²-4ac)/2a.
If b² > 4ac the solutions are real. If b²-4ac is a perfect square, the solutions are real and rational; otherwise they’re real but irrational.
If b² < 4ac the solutions are complex.
7 0
3 years ago
Help me with this FAST
zaharov [31]

Step-by-step explanation:

32 feet is the answer in this

5 0
3 years ago
The graph plots four equations, A, B, C, and D:
rjkz [21]

Answer:

Hi! The answer to your question is D. Equation B and Equation D

Step-by-step explanation:

☆*: .。..。.:*☆☆*: .。..。.:*☆☆*: .。..。.:*☆☆*: .。..。.:*☆

☆Brainliest is greatly appreciated!☆

<em>Hope this helps!!</em>

<em>Stay Safe!!!</em>

- <em>Brooklynn Deka</em>

7 0
3 years ago
Read 2 more answers
Can someone help me with this question?​
WITCHER [35]
Sure the answer is obviously 9
7 0
3 years ago
Other questions:
  • What is the inverse of f(x) = 3x + 6 and is it a function?
    14·2 answers
  • What is the quotient of 3/5 and 1/10<br> A.1/6<br> B.1/3<br> C.3<br> D.6
    7·2 answers
  • Please help to solve this!
    5·1 answer
  • What's is equivalent to 3.7
    14·2 answers
  • The constant of proportionality
    7·1 answer
  • Which statement should go in the box with the question marks? A) Congress could control trade. B) There was no national court sy
    7·1 answer
  • The area of the rectangle and triangle and trapezoid?
    13·1 answer
  • I need help? For precalculus
    12·1 answer
  • Can someone please help?
    15·1 answer
  • Jenny has c charms on her bracelet. Her older sister has 5 more charms than Jenny. Write an expression that shows how many charm
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!