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
professor190 [17]
1 year ago
14

a password system uses four digits from 0 to 9. how many different four-digit passwords with no digit repeated are possible?

Mathematics
1 answer:
JulijaS [17]1 year ago
3 0

Total 5040 passwords can be generated when no digits are repeated

• Permutation in mathematics is an arrangement of objects in an definite order. The elements or sets or things are arranged in sequential order or linear order.

• Permutation is classified into four types :

1) where repetition is not allowed

2) where repetition is allowed

3) objects that are non distinct  

4) circular permutation

• The formula for calculating permutation is n!/(n-r)!

As we are given that the password uses four digits from 0-9 and repetition is not allowed.

So, n = 10 and r = 4

Using the formula for permutation we get

= 10! / (10-4)!

= 10!/6!

= 10 * 9 * 8 * 7 * 6! / 6!

= 10 * 9 * 8 * 7

= 5040

Therefore, 5040 four digit passwords are possible when no digit is repeated.

Learn more about permutaion here

brainly.com/question/12468032

#SPJ4

You might be interested in
Step 1: 4r +5 = 7
zhannawk [14.2K]

Answer:

1- r=.5

2- x=.5

Step-by-step explanation:

sorry my handwriting is bad

4 0
3 years ago
What are the zeros of the function y = x2 + 10x – 171, and why?
vagabundo [1.1K]
To find the zeros, you have to factor the equation.
y=(x+19)(x-9)
This is because 19*-9=-171 and 19-9=10.
Now to make x=0, you have to make the equation
x+19=0
and x-9=0
To solve, isolate x on both equations.
This makes x=-19 and x=9.
5 0
3 years ago
Find all the real square roots of –(9/16)
beks73 [17]
We are asked t determine the real square root of -(9/16). the square root of a negative number is an imaginary number hence the answer to this problem is A. no real root. If this number is a positive number, then the answer would have been +-3/4
7 0
3 years ago
Read 2 more answers
Find the part. What is 160​% of 11.1​?
skad [1K]

Answer:160​% of 11.1 is 17.76

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
When can a parallelogram also be a kite?
Fofino [41]

9514 1404 393

Answer:

  when it is a rhombus

Step-by-step explanation:

A kite is a figure in which the diagonals are perpendicular, and one of them is bisected by the other. It will be a parallelogram if both diagonals bisect each other. Such a figure (with mutually perpendicular bisectors as diagonals) is a rhombus.

A parallelogram that is a rhombus will also be a kite.

5 0
3 years ago
Other questions:
  • 4,750 mm
    15·1 answer
  • A local movie theater charges $12 for an adult ticket and $10 for a child's ticket. a group of eight people spent a total of $86
    7·1 answer
  • Which graph best represents the solution to 1/3x + 5= 5.5?
    5·2 answers
  • Find the distance BF for the points B(1, –1) and F(–3, 5).
    8·1 answer
  • You spending $144 for new sweaters,T-Shirts and pants.Sweaters cost $28,T-Shirts (t) cost $14 and pants (p) cost $23,each.Which
    11·1 answer
  • How do animators use math
    7·1 answer
  • James bought a plant that was 3 inches tall. Each week the plant
    8·1 answer
  • Abby sold half of her comic books and then bought seventeen more. She now has 32. With how many did she begin?
    13·1 answer
  • 4x + 5y = 3<br>kx + 15y = 9 find k<br>​
    5·1 answer
  • A+3 1/4+5 2/9 what is the value of a, explain how you got the answer
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!