Question

Medal
Three cards—one red, one green, and one blue—are to be arranged in a stack. Using R for red, G for green, and B for blue, list all the different stacks that can be formed. (Some computer monitors are called RGB monitors for the colors red, green, and blue. Enter your answers as a comma-separated list.)

Answer 1

What do you think?

Answer 2

But question what does the RGB monitor thing have to do with anything I'm confused xD

Answer 3

ignore that part of the question

Answer 4

Oh okaii ^-^

Answer 5

First imagine choosing a card at random. Select one of the colors that the card might be.

Answer 6

red

Answer 7

ok, so we have
R

Answer 8

Now imagine choosing another card. What color might it be?

Answer 9

green or blue

Answer 10

right
so the combos we have so far are
RG
RB
what card might we draw next in each case?

Answer 11

GB

Answer 12

you should really say all three cards

Answer 13

GBR

Answer 14

we should be careful with the order
the first card we drew was R, let's say the next is G
so we have the stack RG
what is the next card we will draw?

Answer 15

RB

Answer 16

no, we are only drawing one card at a time
first we drew R, which gave us the stack R
then we drew G, which gave us the stack RG
if we draw one more card, there is only one color left, so the last card will be...?

Answer 17

B

Answer 18

yes, last we will draw B, giving us the stack RGB

Answer 19

what about the other branch, where we draw R, then B, giving us the stack RB
what will be the third card in this case?

Answer 20

RG

Answer 21

you keep saying R again, but we are only drawing one card...

Answer 22

BG

Answer 23

again, that is two cards

Answer 24

green is left

Answer 25

correct, so we had the hand RB, and after we draw G we will have the stack RBG

Answer 26

keep filling up the tree

Answer 27

so now we imagine drawing a card besides R first