Question

How many 7 letter words can be formed from the word EQUATOR if...

Answer 1

E) the letters Q, U, and A must be seperated?

Answer 2

Hey um I think I got the idea but im having trouble with the multiplying...

Answer 3

Hey man don't worry about it, I appreciate your willingness but you need to know about factorials and how to apply them before you will be able to assist me here. Don't feel like you owe me anything. :)

Answer 4

Oh yeah and here...

Answer 5

is it EQUATOR or EQUATION???

Answer 6

..... I kinda do feel like I owe u something cuz its like u helped me but I didnt help u and I was raised like that so yeah...

Answer 7

Hi @Catlover5925 it is indeed equator

Answer 8

@CoDsTeR9000 Trust me, I'm cool about it. Unfortunately you haven't reached the necessary level of education which is a fact I understand and respect. If it makes you feel better you can fan and medal me :) that seems to be what most of us on the site strive to acquire anyways.

Answer 9

Ok man if you say so.... thanls anyways for the problem solver! :)

Answer 10

@CoDsTeR9000 you are welcome, I hope you found it helpful.

Answer 11

im soo sorry but i dont think any words can be made from this, but you have posted this question like 3 times

Answer 12

Anyways I gtg so seeya guys.... and gals!

Answer 13

Hi @Catlover5925 the goal of this question it to find all the possible arrangements of the letters, the results dont have to be real words, as long as the specifiec criteria is met it counts. Sorry, about that perhapes I should have specified.

Answer 14

*specified

Answer 15

@CoDsTeR9000 Adios.

Answer 16

so EUTAOQR would work??? :/

Answer 17

is this homework??

Answer 18

that's right

Answer 19

it is... grade 12, do you know about factorials and permutations/combinations etc?

Answer 20

If not, it's not nearly as straightforward as it may seem.

Answer 21

oh yes!!!!! ok so first thing first do you think this is a permutation or combination

Answer 22

permutation, brb 1 sec

Answer 23

back

Answer 24

it is a permutation because the order matters

Answer 25

so it would be \[_{7}P _{3}\] do you have the P button on ur calculator??

Answer 26

I do, can you explain how you got this?

Answer 27

oh! wait!

Answer 28

I think I know what to do now

Answer 29

I need to find the possibilities in which those three letters are seperated using 3!*4! = 144

Answer 30

wait you use factorials when they cant be repeated next to eachother

Answer 31

then, subtrace from the value of 7!.... I think

Answer 32

here this is what i am looking at
http://www.mathsisfun.com/combinatorics/combinations-permutations.html

Answer 33

yeah, you just do it differently. I'm still foggy on the steps though

Answer 34

look at the site

Answer 35

you use them in diffrent situation
i am in 10th grade and learned this in 8th grade

Answer 36

hmm, doesn't seem to overview this particular scenario

Answer 37

standby

Answer 38

yep! that's the way to do it

Answer 39

(7!) - (3!)(4!)

Answer 40

wait how...doing a factorial?? awesome then i agree cuz i am totally lost!!!!!!

Answer 41

we get 4896

Answer 42

I used this video: https://www.youtube.com/watch?v=wf7PB1WkAv8#t=704

Answer 43

yes thats it...good job!!!!!!

Answer 44

can i have a medal??

Answer 45

around 10:53 maybe, thanks. Sure! you deff stuck arond for a while!

Answer 46

yep, lol :)

Answer 47

@EricWise