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
user100 [1]
2 years ago
12

A group of 10 people is choose a chairperson and vice-chairperson. They put all 10 peoples names into a bar. The first name draw

n becomes chair. The second name drawn becomes vice-chair. How many possible combinations of chair and Vice-chair are there ?
Mathematics
1 answer:
Tanzania [10]2 years ago
8 0

Answer:

90

Step-by-step explanation:

A group of 10 people is choose a chairperson and vice-chairperson. They put all 10 peoples names into a bar. The first name drawn becomes chair. The second name drawn becomes vice-chair. How many possible combinations of chair and Vice-chair are there ?

This is calculated using the Permutation formula

nPr = n!/(n - r)!

Where:

n = 10 people

r = 2 = 2 positions to be filled , Chairman and Vice chairman

Hence:

10P2 = 10!/(10 - 2)!

= 90 ways

You might be interested in
Gina can buy a 5-pound bag of apples that cost $4.50, or she can buy them by the pound for $0.85 or pound. Which of these best e
sweet-ann [11.9K]
It's "D", because when you divide 4.5/5 you get .90 per pound so buying per pound it less.
5 0
3 years ago
A standard die is rolled 600 times. How many times would you expect to roll a number
jekas [21]
Their are 3 numbers less than 4 on a die with 6 sides so 3 is 50% of 6 so then it should land on a number less than 4 50% of the 600 rolls to get 300
5 0
3 years ago
Read 2 more answers
A car is designed to last an average of 12 years with a standard deviation of 0.8 years. What is the probability that a car will
Scorpion4ik [409]
Due to the common probability formula I can solve that task. Refering to the task you gave, we have all the information we need. We solve it like that: \frac{10-12}{0.8} = -2.5; Probability(-2.5)=.0.00621; Probability = 0.621%
So the answer is the first option <span>0.621%</span>
5 0
3 years ago
Read 2 more answers
There are 9 people that have a conversation with each other exactly one time.
Sedbober [7]

The question is an illustration of arithmetic sequence.

<em>The number of conversation for 19 people is 171</em>

<u />

<u>(a) 9 people</u>

Total = \frac{9 \times 8}{2}

9 represents the number of people

8 represents the number of conversation each person had

2 represents the number of people having a conversation at once (i.e 2 people at once)

<u>(b) 19 people</u>

We have:

n = 19

The number of conversation is:

Total = \frac{n \times (n -1)}{2}

So, we have:

Total = \frac{19 \times (19 -1)}{2}

Total = \frac{19 \times 18}{2}

Total = 19 \times 9

Total = 171

Hence, the number of conversation for 19 people is 171

Read more about arithmetic sequence at:

brainly.com/question/18109692

5 0
2 years ago
2% of the ducks in a pond have a fluffy tail. If 4 ducks have a fluffy tail, how many ducks are in the pond. Please answer best
loris [4]

Answer:

200

Step-by-step explanation:

just look up 2% of 4 is what and you will get the same answer

3 0
3 years ago
Other questions:
  • One canned juice is 15% orange juice another 10% orange juice. How many liters of each should be mixed together in order to get
    15·1 answer
  • If AB=50, what are AC and CB?
    13·1 answer
  • A lawnmower was purchased for rupees 1100 and rupees 50 were paid as transportation charges. It was sold at a 14% profit. Find i
    8·1 answer
  • Which of the following is the most appropriate unit to describe the rate at which water flows out through a standard household f
    13·1 answer
  • Solve 5 tanx=523 for ° SXS 180°.
    12·1 answer
  • Terry Clayton has an open-ended lease for an SUV. The lease costs $421.38 for 48
    7·1 answer
  • It takes sue 1 2/3 min to run a lap around a school field. How many laps can she run in
    10·1 answer
  • Another question math
    11·2 answers
  • If a town with a population of 10.000 doubles in size every 17 years, what will the population​
    6·1 answer
  • F(x)=-3+|x-11| reflection across the Y axis
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!