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
10ac-x/11=-3 solve for a
Masja [62]
1) You'll have to get raid of the fraction by multiplying 10ac by 11, x/11 by 11 which the 11's cancels out and -3 multiplied by 11 .
2)Now you have 10ac -x = -33. Add x on both sides of the equal sign you get 10ac = -33 + x
3) Divide both sides by 10c to get "a" by itself, so "a" = -33+x divided by 10c
4 0
3 years ago
Read 2 more answers
Complete the following statements.
SashulF [63]

The 99.87th percentile, or the area to the left of the 3 standard deviation mark it 99.87% better than everyone/everything else.

6 0
3 years ago
What is the measure of <2?
Ugo [173]
I think 90 degrees but not 100 percent sure
5 0
3 years ago
Solve the equation -10=-6+2c
Neko [114]
C=-2

I hope this helped!

9 0
3 years ago
Read 2 more answers
which is the correct simplified version of the expression shown after distrubuting and combining like terms? 1/3(9x-15)+2x​
zhannawk [14.2K]

Answer:11x + 5

Step-by-step explanation:1/3 times 9X is 3x. 1/3 times 15 is 5. Now you have 9x + 5 + 2x

9x + 2x = 11x

Final answer: 11x + 5

7 0
3 years ago
Other questions:
  • Factor completely. y2+6y+8
    8·2 answers
  • How do you factor the expression<br> 20k+50
    10·2 answers
  • How many students did Rebecca observe when she collected her data?
    6·1 answer
  • Does anyone know the answer?
    5·1 answer
  • A square banner has an area of 289 square inches.
    10·1 answer
  • I got the wrong answer, does anyone know what the right answer is?
    12·1 answer
  • On a certain hot summer's day, 346 people used the public swimming pool. The daily prices are $1.75 for children and $2.00 for a
    13·1 answer
  • Neeeeddd hwlppppp pplzzzzzzzzzzzz math 20 points
    14·1 answer
  • Ill give you brainliest if you answer this question!​
    15·1 answer
  • Do the points on the linehave a constant ratio of they-coordinate to the x-co-ordinate for any point onthe line except the y-int
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!