Need help to solve. Say some hints

[ib-Rahim_010]

Whoops something went wrong
I remove it

[shahriaraminarif1234]

Nijeo solution niya confusion e asi

[soniakakon01]

Ibrahim tui age nije chesta kor, 90 bar submit koreo hoinai tai na?

[105085]

Nije chesta na kore agei sahajjo chaile medha nosto hoye jay

[nargisakter1572]

I have no idea about combinatorics because I read in class 7

[ROHAN1230]

Ways to solve কলম নিবা

Firstly, we will consider the four persons named in the problem.Let’s start finding the ways- (the colors are written with the first letter) Rafin. Rahul. Jaber. Jubair. TOTAL WAYS g. g. g. b. → 9!/(6!2!) g. g. b. g. → " g. g. g. r. → 9!/5!3! g. g. r. g. → " g. g. b. r. → …

Check this…

[ib-Rahim_010]

Tuio to ekjoner shahajjo nisis amar sathe
Taina @soniakakon01

[nargisakter1572]

I am not understanding it.

[soniakakon01]

In stead of asking in the community, you should study combinatorics first nevertheless it’ll be hard for you to understand in a nutshell

[nargisakter1572]

Okay, thanks to you.