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
LekaFEV [45]
3 years ago
6

You volunteer to help drive people home from an event. There are 18 people who need rides, but you can only fit 7 of them in you

r vehicle. How many different groups of 7 people can you drive?
Mathematics
1 answer:
PilotLPTM [1.2K]3 years ago
5 0
18 choose 7 
=C(18,7)
=18!/(7!(18-7)!)
=31824
OR
18 choices for first passenger,
17 choices for second passenger,
....
12 choices for 7th passenger,
so total = 18*17*16...12
but there are 7! ways to order the 7 passengers, so
number of groups
=18*17*16...12/7!
=31824   as well
You might be interested in
HELP WILL GIVE BRAINLIEST!!!!<br><br> How many 1/2 cups are in 3/4 cups?
Whitepunk [10]

Answer:

1 1/2 or 1.5

Step-by-step explanation:

think: half of 4 is 2 so 1 half cup would make it to 2/4

than half of that is 1/4 which is 1/2 of 1/2 a cup

adding that to 2/4 makes it 3/4 so therefore... (Peep the answer)

4 0
2 years ago
A restaurant offers three types of meats: chicken, beef,
sp2606 [1]

Answer:

200

Step-by-step explanation:

If the waiters surveyed 50 customers and half of the customer's favorite meat was chicken, then if 400 pieces of meat were ordered 200 pieces should be chicken.

If \frac{50}{chicken} = \frac{50}{25} = \frac{1}{2}, then \frac{400}{chicken} = \frac{400}{2} = 2

I hope that makes sense :)

7 0
2 years ago
A survey was taken of twenty dentists about Sparkly toothpaste. Sixteen of the dentists recommended Sparkly toothpaste to their
Bas_tet [7]

Answer: There are 40 dentists who would recommended Sparkly toothpaste to their patients .

Step-by-step explanation:

Since we have given that

Out of 20 dentists, a survey was taken of about Sparkly toothpaste,

Number of dentists recommended Sparkly toothpaste to their patients = 16

Percentage of dentists who recommended Sparkly toothpaste to their patients be

\frac{16}{20}\times 100=80\%

Out of 30 dentists, a survey was taken of about Sparkly toothpaste,

Number of dentists recommended Sparkly toothpaste to their patients = 24

Similarly,

Percentage of dentists who recommended Sparkly toothpaste to their patients be

\frac{24}{30}\times 100=80\%

Now, we have asked to find the number of dentists recommended Sparkly toothpaste to their patients if survey was taken of 50 dentists.

As we have seen that there is always 80% of total number of dentists surveyed have recommended Sparkly toothpaste to their patients ,

so, According to this pattern , we get that

\frac{80}{100}\times 50=40

Hence, there are 40 dentists who would recommended Sparkly toothpaste to their patients .


5 0
2 years ago
PLEASE HELP..MATH 8TH GRADE​
jolli1 [7]

Answer. z = ± √10 = ± 3.1623

8 0
3 years ago
Read 2 more answers
Sally is making a painting for which she is mixing red paint and blue paint. The table above shows the different mixtures being
aleksandr82 [10.1K]
1 1/2 - 2 1/2 is 3/2:5/2     or a 3:5 ratio
2 2/5 - 4       is 12/5:20/5 or a 3:5 ratio
3 3/4 - 6 1/4 is 15/4:25/4 or a 3:5 ratio
4       - 6 2/3 is 12/3:20/3 or a 3:5 ratio
1.2- 2       if divided by .4 is a 3:5 ratio
1.8-3        if divided by .6 is a 3:5 ratio
the unit rate is 3:5
Since all units are 3:5 it is proportional
8 0
3 years ago
Read 2 more answers
Other questions:
  • Suppose you buy a CD for $1000 that earns 2.5% APR and is compounded quarterly. The CD matures in 5 years. Assume that if funds
    14·2 answers
  • I don't really know how to start
    8·2 answers
  • In triangle △ABC, ∠ABC=90°, BH is an altitude. Find the missing lengths. AH=HC+2 and BC=2, find HC.
    13·2 answers
  • Solve the following system of equations by substitution and select the correct answer below:
    15·2 answers
  • What’s the equation of the line with the given properties passes through (-4,-2) and (-4,5)
    14·1 answer
  • Which symbol replaces ? to make the statement true?
    13·2 answers
  • I could use help with anything idc
    12·2 answers
  • Find the triangle's area. Drawing not to scale.
    9·1 answer
  • How does the graph change between point A and point B? On a coordinate plane, a graph increases from (0, 0) to point A and then
    5·1 answer
  • Which of the following best defines the two quantities that are measured to find the call rate of a phone company? Group of answ
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!