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
lina2011 [118]
2 years ago
14

A university offers 3 calculus classes: Math 2A, 2B, and 2C. A set of students have each taken at least one of the three classes

. 51 have taken Math 2A, 80 have taken Math 2B, and 70 have taken Math 2C. 15 students have taken Math 2A and 2B, 20 have taken Math 2A and 2C, and 13 have taken Math 2B and 2C. Only 4 have taken all three classes. How many students are there in the set?

Mathematics
1 answer:
lyudmila [28]2 years ago
4 0

Answer:

157

Step-by-step explanation:

We are given that

Number of students in maths 2A=n(2A)=51

Number of students in math 2B=n(2B)=80

Number of students in math 2C=n(2C)=70

Number of students in maths 2A and 2B=n(A\cap B)=15

Number of students in maths 2B and 2C=n(B\cap C)=13

Number of students in maths 2A and 2C=n(A\cap C)=20

Number of students in maths 2A ,2B and 2C=4

We have to find the number of students in a set.

Formula:n(A\cup B\cup C)=n(A)+n(B)+n(C)-n(A\cap B)-n(B\cap C)-n(A\cap C)+n(A\cap B\cap C)

Substitute the values in the given formula

n(2A\cup 2B\cup 2C)=51+80+70-15-13-20+4=157

Hence, total number of students in a set=157

You might be interested in
What is the opposite operation of squaring? Using this opposite operation, rewrite the equation from question 1 so s is by itsel
Radda [10]
The opposite operation of squaring is to find the square root. I dunno what the original equation is so I can’t help with that
5 0
2 years ago
Find BC round to the nearest tenth
slega [8]

Answer:

6.7

Step-by-step explanation:

Here, we can apply cosine law, c^2=a^2+b^2-2abcos\theta

We the plug in values: (CB)^2+6^2+5^2-2*6*5*cos74

and solve that CB is around 6.7

3 0
3 years ago
Which reflection rule, if any, can be used to prove that rectangle A(-8, -3), B(-2,-3), C (-2,-6), D(-8,-6) and rectangle A'(8.-
Zina [86]

Answer:

d

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Desmond kept track of his results for all 75 rolls. The table at right shows some of his results. Based on his partial results,
nadezda [96]

Answer:

hello

Step-by-step explanation:

4 0
2 years ago
Write the following number in standard form<br> 3.45 x 10^-4
Kay [80]
35000 is the answer of im not wrong
5 0
3 years ago
Other questions:
  • A bag contains 3 red cards numbered 1-3 and 4 white cares numbered 1-4 you choose a card at random
    8·1 answer
  • What's the sum of two integers with different signs is 8
    5·1 answer
  • What is the simplified value of the exponential expression 27}?<br> оооо<br> 3<br> 9<br> 1/3<br> 1/9
    11·1 answer
  • Anyone know how to work this out -2p-5=-37
    15·1 answer
  • The movie rental store CineStar offers customers two choices. Customers
    10·1 answer
  • Which side lengths form a right triangle?
    13·1 answer
  • Which expression could be used to find the volume of the prism shown below?
    9·1 answer
  • What is 10 2/3 nearest half
    14·1 answer
  • Write and solve the inequality.
    5·1 answer
  • 9. A recipe calls for 6 cups of flour and 2 cups of sugar. What is the ratio of flour to sugar in simplest form?​
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!