Question

counting problem

Answer 1

que:- In how many ways can 4 red, 3 yellow and 2 green discs be arranged in
a row if the discs of the same colour are indistinguishable ?

Answer 2

4 x 3x 2

Answer 3

so 24

Answer 4

wait!!!!!!!!

Answer 5

lol no answer is 1260

Answer 6

i knew it!!!!!!

Answer 7

it didnt seem right lol

Answer 8

how did u get that lol?

Answer 9

@mathmath333

Answer 10

from back of the book

Answer 11

lmao wow

Answer 12

so u dont know how to do it?

Answer 13

yep

Answer 14

u do or dont?

Answer 15

lol this dude bocked me cause i fanned him

Answer 16

i am also struggling to understand the meaning of sentence

"arranged in
a row if the discs of the same colour are indistinguishable"

Answer 17

This means you can't tell the difference between two discs of same color, so saying we have #1 green disc and #2 green disc.

1 2 in order is same as 2 1. As in there is only one way to arrange #1 and #2 disc.

Answer 18

ok i see the key meaning

Answer 19

4 red, 3 yellow and 2 green

that's \(\large \frac{9!}{4! \ 3! \ 2!} \)

Answer 20

that equals 1260

Answer 21

thnx