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Anika [276]
2 years ago
7

A password is 4 characters long and must consist of 3 letters and one number. if letters cannot be repeated and the password mus

t end with a number, how many possibilities are there? a. 175,760 b. 158,184 c. 156,000 d. 140,400 please select the best answer from the choices provided a b c d
Mathematics
1 answer:
cestrela7 [59]2 years ago
4 0

We will see that there are 156,000 different combinations, so the correct option is C.

<h3>How many possibilities are there? </h3>

First, we need to find the selections, here we have:

  • First letter.
  • Second letter.
  • Third letter.
  • Number.

Now we need to find the number of options for each of these selections.

  • First letter. (26 options)
  • Second letter. (25 options, because we can't repeat letters)
  • Third letter. (24 options)
  • Number. (10 options).

We assumed that the number can be any integer from 0 to 9.

The total number of possibilities is equal to the product between the numbers of options, we will have:

P = 26*25*24*10 = 156,000

So, the correct option is C.

IF you want to learn more about combinations.

brainly.com/question/11732255

#SPJ4

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How do you solve a system of linear equations by graphing? ​
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9514 1404 393

Explanation:

This is a self-answering question: you solve it by graphing the equations.

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The equations can be graphed by any of a number of methods. (My favorite is to let a graphing calculator do it.) The method of choice depends on the coefficients and the form the equations are given in. Methods of graphing are a topic for a more lengthy discussion.

6 0
3 years ago
You have 24 months left until you graduate and you plan on buying yourself a new $20,000 car on graduation day. If you invest $3
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Answer: No, the money won't be enough to buy the car

Step-by-step explanation:

you plan on buying yourself a new $20,000 car on graduation day and graduation day is 24 months time. If you invest $300 a month for the next 24 months.

The principal amount, p = 300

He is earning 4% a month, it means that it was compounded once in four months. This also means that it was compounded quarterly. So

n = 4

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r = 4/100 = 0.04

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