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
yKpoI14uk [10]
3 years ago
8

A class of 32 students is organised in 33 teams every team consists of 3 students and there are no identical teams . show that t

here are two teams with exactly one common student
Mathematics
1 answer:
Tresset [83]3 years ago
6 0

Answer:

Step-by-step explanation:

Let's start by making up as many teams as we can with the 32 student. Given that each team is different, we can make 10 teams of 3 each. (we still have 23 more teams to make).

The last two people make a team of only 2. No matter which student from the 30 other students is picked, the team of two and the one the student is coming from will have one student in common. Though there are more borrowings that take place (many more), the results remain as stated. At least 2 teams will have 1 person in common.

The method is called the pigeon hole method.

You might be interested in
You select a marble without looking and then put it back. If you do this 6 times, what is the
Sindrei [870]

Answer:

One time

Step-by-step explanation:

The probability of picking a purple marble once is 1/6, so if I pick a marble 6  times, then (1/6)*6=1

3 0
3 years ago
Which of the following is a composite number?<br><br> A)47<br><br> B)91<br><br> C)101<br><br> D)131
Varvara68 [4.7K]
91 = 7*13 is a composite number. It has factors other than itself and 1.
3 0
3 years ago
at a particular high school, 42% of the students participate in sports and 25% of the students participate in drama. if 53% of t
baherus [9]

The probability that a student participates in both sports and drama is 0.14.

<h3>What is the formula for P(AUB), where A and B are any two events?</h3>

If A and B are any two events, then the probability of the joint event (A\cup B) is given by the following formula: P(A\cup B)=P(A)+P(B)-P(A\cap B)

Given that 42% of the students participate in sports and 25% of the students participate in drama and 53% of the students participate in either sports or drama.

Suppose S denotes that "a student participates in sports" and D denotes that "a student participates in drama".
So, we have P(S)=\frac{42}{100}=0.42, P(D)=\frac{25}{100}=0.25, P(S\cup D)=\frac{53}{100}=0.53.

We want to find the probability that a student participates in both sports and drama i.e., we want to find P(S\cap D).

By the above formula, we obtain:

P(S\cup D)=P(S)+P(D)-P(S\cap D)\\\Longrightarrow P(S\cap D)=P(S)+P(D)-P(S\cup D)\\\Longrightarrow P(S\cap D)=0.42+0.25-0.53\\\therefore P(S\cap D)=0.14=\frac{14}{100}

Therefore, the probability that a student participates in both sports and drama is 0.14.

To learn more about probability, refer: brainly.com/question/24756209

#SPJ9

6 0
2 years ago
Read 2 more answers
Graph triangle RST with vertices R3, 7), S(-5, -2), and T(3, -5) and its image after a reflection over 3​
Alja [10]
Skis dhdjaknsjdkjshdjdkbsjfkdnbskdksndjrjdbndje
6 0
3 years ago
18 (- x - 2) - 4 (- 9 + 3x) = -14<br><br> Find the value of X
igomit [66]

Answer:

x = 7/15

Step-by-step explanation:

you can check by replacing the x with the number I gave you

5 0
2 years ago
Other questions:
  • 12 players for a softball team show up for a game: (a) how many ways are there to choose 10 players to take the field?
    15·1 answer
  • Give an example of an open equation? my answer is, x + 4 = 7 Until the value of x is found, it is unknown whether the equation i
    14·1 answer
  • Negative 6n minus 2n ecualizarán 16
    9·1 answer
  • Help me solve:<br> 3.14•8^2•23<br> And round to nearest tenth if necessary
    8·1 answer
  • Im stuck on this question..​
    8·1 answer
  • If you grow 523 eggplants and sell 378, how many do you have left? A. 901 B. 154 C. 197 End of exam D. 145
    8·2 answers
  • Which two fractions have a sum of −730
    14·1 answer
  • Brainliest to whoever gets this CORRECT.
    9·1 answer
  • How do you explain how to answer this -2 - (-6)<br>​
    15·1 answer
  • I need help with this problem. ​
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!