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
larisa [96]
3 years ago
6

How many different four lettered codes can be formed if the first letter must be an S or a T

Mathematics
1 answer:
emmainna [20.7K]3 years ago
8 0

Answer:

27,600

Step-by-step explanation:

We use the following formula:-  

Number of permutations of r from n

= nPr

= n! / (n-r)!

I am assuming you don't allow repeated letters in the 4 letter codes.

Take S as the first letter. Then we have 3 letters extra out of 25 letters.

Using the above formula the possible ways of doing this is

25! / (25 - 3)!

25! / 22!

= 25*24*23

= 13800.

The same number is obtained if the first letter is a T.

So the answer is 2*13800

= 27,600

You might be interested in
Write a ratio for the following description: Kaleel made three times as many baskets as John during a basketball practice.
Hoochie [10]

Answer:

3:1

Step-by-step explanation:

If John makes 3, Then Kaleel makes 9,  If John makes 1, Then Kaleel makes 3.

8 0
3 years ago
Deserts cover about = of all the land
NeX [460]

Answer: Deserts cover one-third, of the Earth's total landmass.

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
a soccer team won 6 games out of 10 total games. If they played 25 total games, how many games did they win?
emmainna [20.7K]
2.4. I believe so your welcome
7 0
3 years ago
Please please help I don’t understand
9966 [12]

Answer:

2x+3y= 1500

Step-by-step explanation:

8 0
3 years ago
Complete this item. Use the definition of a polygon inscribed in a circle to help you develop a definition for a polygon inscrib
SCORPION-xisa [38]

It should be noted that a polygon that's inscribed in a circle has each vertex on the outer figure.

<h3>What is a polygon?</h3>

It should be noted that a polygon simply means a plane figure that has a finite number of straight line segments.

In this case, a polygon that's inscribed in a circle has each vertex on the outer figure. Also regular polygons can be inscribed in a circle.

Learn more about polygon on:

brainly.com/question/24966296

7 0
2 years ago
Other questions:
  • Which of the following is the multiplicative inverse of 2x?<br> 1/2 X<br> -1/2 X<br> -2x<br> 2x
    15·1 answer
  • I need to know the answer please help mr
    9·1 answer
  • Which expression is equivalent to (9x - 3 1/8) - (7x + 1 3/8)?
    5·1 answer
  • What is the value of x?
    8·1 answer
  • Help finding the sum
    7·1 answer
  • A rectangle is 6 feet long by 4 feet wide.
    7·1 answer
  • Select all of the situation is below that can be modeled by the expression 4 + 3 * ​
    11·1 answer
  • Help me out yall PLEASE
    6·1 answer
  • Simplify f(x+8)=(x+8)^2+7(x+8)+1
    11·2 answers
  • The sum of a number and -2 is -9 . what is the number
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!