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Passwords Given the characters $A, B, C, H, I, T, U, V,$ $1,2,3,$ and $4,$ how many seven-character passwords can be made? (No repeats are allowed.) How many if you have to use all four numbers as the first four characters in the password?

3,991,680; 8064

Intro Stats / AP Statistics

Chapter 4

Probability and Counting Rules

Section 4

Counting Rules

Sampling and Data

Probability Topics

Virginia H.

October 12, 2020

Temple University

Piedmont College

Cairn University

University of St. Thomas

Lectures

0:00

01:24

How many different four-le…

01:13

00:47

A 4-character password use…

00:32

Solve each counting proble…

01:08

Solve by the method of you…

00:30

Does the problem involve p…

04:31

REVIEW Jessica wants to cr…

01:59

Passwords A certain websit…

01:06

Code Words How many differ…

02:41

Forming Codes How many dif…

00:48

How many ways are there to…

01:20

01:19

a. Lena wants a password t…

01:00

How many different 5-digit…

02:53

Zip Codes How many 5-digit…

00:42

How many three-digit numbe…

00:27

How many combinations of f…

Determine the number of po…

03:11

How many license plates ca…

00:55

How many different license…

here we have to find out a seven character password by using a bow, All for birds on numbers. He'll be house seven spaces to filled. Oh, all for birds are numbers to Miko passport. InfoSpace off we can fill in 12 is because eight, all four birds are there on four numbers. Are there total, well, characters so we can fill in first space of Elvis. Then we can feel only 11 ways because you know character is not repeating so living, then in KASPER's, we can feel it in only 10 days off the dirt. Nine. This then eight Rays are there to fill the fifth space on seven ways to fill in six pace and six ways to fill in seven space, we will get 399 one six. Eijiro Iffy multi play all the Airborne members. We will get 3991680 in our second option if you feel only numbers in 1st 4 characters. If you feel only numbers in 1st 4 characters, how many combinations are passwords? Can we make? Let's see, 1st 4 art supposed to use only numbers. So here four numbers are there, so we can feel in four ways after dirt three V's here. Also, we are not repeating the number are all forward. So forced fourth place spaces for only numbers on then third space. We can feel it in two ways. On in fourth space, we can feel it in only one way. No, no muscle over. Only all forbids are there. Those are eight all four bets so we can feel eight. Raise in fifth space seven ways in six space in finally seven space weaken, fill in six with If you multiply, able all the numbers we will get. Eggs Seattle 64 Begin. Make 8064 passwords by using about all for birds on numbers. Barrett, 064

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