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
Illusion [34]
3 years ago
7

An elementary school is offering 3 language classes: one in Spanish, one in French,and one in German. The classes are open to an

y of the 100 students in the school.There are 28 students in the Spanish class, 26 in the French class, and 16 in theGerman class. There are 12 students that are in both Spanish and French, 4 thatare in both Spanish and German, and 6 that are in both French and German. Inaddition, there are 2 students taking all 3 classes.
(a) If a student is chosen randomly, what is the probability that he or she is not in any of the language classes?(b) If a student is chosen randomly, what is the probability that he or she is taking exactly one language class?(c) If 2 students are chosen randomly, what is the probability that at least 1 is taking a language class?
Mathematics
1 answer:
Alona [7]3 years ago
3 0

Answer:

A. 0.5

B. 0.32

C. 0.75

Step-by-step explanation:

There are

  • 28 students in the Spanish class,
  • 26 in the French class,
  • 16 in the German class,
  • 12 students that are in both Spanish and French,
  • 4 that are in both Spanish and German,
  • 6 that are in both French and German,
  • 2 students taking all 3 classes.

So,

  • 2 students taking all 3 classes,
  • 6 - 2 = 4 students are in French and German, bu are not in Spanish,
  • 4 - 2 = 2 students are in Spanish and German, but are not in French,
  • 12 - 2 = 10 students are in Spanish and French but are not in German,
  • 16 - 2 - 4 - 2 = 8 students are only in German,
  • 26 - 2 - 4 - 10 = 10 students are only in French,
  • 28 - 2 - 2 - 10 = 14 students are only in Spanish.

In total, there are

2 + 4 + 2 + 10 + 8 + 10 +14 = 50 students.

The classes are open to any of the 100 students in the school, so

100 - 50 = 50 students are not in any of the languages classes.

A. If a student is chosen randomly, the probability that he or she is not in any of the language classes is

\dfrac{50}{100} =0.5

B. If a student is chosen randomly,  the probability that he or she is taking exactly one language class is

\dfrac{8+10+14}{100}=0.32

C. If 2 students are chosen randomly,  the probability that both are not taking any language classes is

0.5\cdot 0.5=0.25

So,  the probability that at least 1 is taking a language class is

1-0.25=0.75

You might be interested in
Which is the equation of the circle that has a diameter with endpoints located at (-2, 0) and (6, 6)?
Tpy6a [65]
(x-2)^2 + (y-3)^2 = 25


center is 2,3
diameter is 10
rad is 10/2 = 5


Mark brainliest please
5 0
3 years ago
Are congruent triangles also similar?
jonny [76]

Answer: yes they are

Step-by-step explanation:

If two pairs of corresponding angles in a pair of triangles are congruent, then the triangles are similar. We know this because if two angle pairs are the same, then the third pair must also be equal.

7 0
3 years ago
Read 2 more answers
Find the value of x and y <br> (5y-23) <br> (2x+13)<br> (3x)<br> 47
liq [111]

Answer:

x = 24

y = 19

Step-by-step explanation:

7 0
3 years ago
Need help ASAP Question 1 of 10
Ulleksa [173]

Answer:

4(x - 9)^2 - 17

Step-by-step explanation:

A horizontal shift to the right by 9 changes x^2 to (x - 9)^2.

A vertical shift down by 1 changes - 16 to -17.

Therefore, the new equation is:

4(x - 9)^2 - 17

5 0
3 years ago
This is due soon help
cricket20 [7]
50 miles = 1 hour
50 x 1 = 50

a. 50 miles x 2 hours = 100 miles
b. 50 miles x 4.3 hours = 215 miles
c. Converting minutes to hours, it would make 20 minutes become 0.333 hours.
50 x 0.333 = 16.65 miles
6 0
3 years ago
Other questions:
  • Find the z value for x=40 for a normal distribution with μ=30 and σ=5
    13·1 answer
  • Find the percent equivalent of the ratio 64 to 80
    10·2 answers
  • Evaluate the expression for the given value of the variable. d=75 2d+−45d−−−−−√3=
    15·1 answer
  • A triangle has vertices T(3, 7), U(6, –6), and V(5, –9). The image of the triangle has vertices T"(8, 1), U"(–5, 4), and V"(–8,
    15·1 answer
  • Find the length of the missing side of the right triangle below.
    11·1 answer
  • How do you explain ratios?
    12·1 answer
  • Analyze each step to identify if Andy made an error. Yes, he made an error in Step 1. He switched the x and y values. Yes, he ma
    6·2 answers
  • If the difference (3x ^ 2 - 2x + 5) - (x ^ 2 + 3x - 2) is multiplied by 3x ^ 2 , what is the result, written in standard form?
    15·1 answer
  • How many liters of water did they use each day?
    5·2 answers
  • I am stuck here plz help I am so sick of this question
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!