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
ser-zykov [4K]
3 years ago
14

How many sets of 7 questions can be chosen from a file of 25 questions?

Mathematics
1 answer:
likoan [24]3 years ago
3 0
If all 25 questions are different,

When order of selection counts:
P(25,7)
=25!/(25-7)!
=15511210043330985984000000/6402373705728000
=2422728000

When order of selection does not count count:
C(25,7)
=25!/(7!*(25-7)!)
=15511210043330985984000000/(6402373705728000*5040)
=480700

You might be interested in
Mr. Chiro drew a design for an outdoor kitchen. The food prep area will be on a rectangular platform made of concrete that is 5
vitfil [10]

Answer:

The volume of platform

= 11 ft³

Step-by-step explanation:

The height of the Platforms are

The food prep area  = 5 ft

Storage shelf = 6 ft

Side of rectangle = b width of platform = d

Therefore area of platform = b·d

Volume of the food prep area platform = Area × height = 5 b·d ft³

Volume of the storage shelf  platform = Area × height of storage shelf platform = 6 b·d ft³

Therefore the total volume = Volume of food storage platform + volume of storage shelf platform = 5 b·d ft³ + 6·b·d ft³ = 11·b·d ft³

8 0
3 years ago
Cody is selling chocolate and white chocolate candy bars for a school fundraiser. 30% of the candy bars sold have been white cho
jeka57 [31]

Answer:

80 total candy bars

Step-by-step explanation;

set up proportion

24

30/100

24 x 100=2400 divided by 30

=80

           

6 0
3 years ago
Read 2 more answers
SAT scores are normally distributed, with a mean of 500 points and a
babymother [125]

Recalling that SAT scores are always expressed as multiples of 10, then the points we get on the test will be 628.

<h3>What do you mean by standard deviation?</h3>

In statistics, Standard deviation is a measure of the variation of a set of values.

σ = standard deviation of population

N = number of observation of population

X = mean

μ = population mean

WE have been given that SAT scores are normally distributed, with a mean of 500 points and a standard deviation of 100 points.

The solution as follows;

Let be X: scores of SAT

P(X ≥ x) = 0.9

P((X - 500)/100 ≥ (x - 500)/100) = 0.9

P(Z ≥ z) = 0.9

z = 1.28

1.28 = (x - 500)/100

128 + 500 = x

x = 628

Recalling that SAT scores are always expressed as multiples of 10, then the points we get on the test will be 628.

Learn more about standard deviation and variance:

brainly.com/question/11448982

#SPJ1

8 0
1 year ago
Which statement is an example of the symmetric property of congruence?
olchik [2.2K]

The symmetric property of congruence states that if a quantity, say, A is congruent to a quantity, say B, then, the quantity B is congruent to the quantity A.

Mathematically, this statement of the symmetric property of congruence can be written as:

If A\cong B, then B\cong A.

Applying this symmetric property of congruence to the question that we are given, we see that only Option D fulfills the conditions of the definition of the property of congruence as Option D clearly states that:

If \Delta EFG\cong \Delta HJK, then \Delta HJK\cong \Delta EFG which is the exact statement of the symmetric property of congruence when applied to triangles.

Thus, Option D is the correct option.

3 0
3 years ago
Read 2 more answers
GIVING 100 POINTS!!!! Quinn is flying a kite. The angle of elevation formed by the kite string and the ground is 44°, and the ki
Inessa [10]

Answer:

64.7 feet

Step-by-step explanation:

Cos(44°) = 0.7193

0.7193 = A/90

A = 64.7 feet

or  

sin44° = y/90

.695... = y/90

y =~ 63 feet    

either way you can get the answer                  

3 0
2 years ago
Read 2 more answers
Other questions:
  • Rick surveyed 50 students at his school to see how many have after-school jobs and how many are getting the new video game conso
    8·1 answer
  • Ginger's cat gave birth to a kitten that weighed 3 3/8 ounces when it was born. On the day Ginger sold the kitten to its new own
    11·2 answers
  • What is the volume of the prism?
    8·2 answers
  • Which shows one way to determine the factors of 4x3 + x2 – 8x – 2 by grouping?
    8·2 answers
  • What number is 18.5% of 80?
    5·1 answer
  • What is an equation of the line that passes through the points (0, -5) and<br> (-5,-1)?
    7·2 answers
  • How would u solve for “r” in D=r(t)
    13·1 answer
  • What is the area of a triangle whose sides have length $\sqrt{70},$ $\sqrt{70},$ and $\sqrt{28}$?
    11·1 answer
  • Can you convert radians to degrees by replacing pi with 180
    9·1 answer
  • A 9-pack of coffee mugs costs $14.04. What is the unit price?
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!