Originally Posted by

**edwardkiely** sorry I forgot to mention in the question that it is on a group of 4 seeds.

I understand this perfectly .6*.4*.4*.4+.4*.6*.4*.4+.4*.4*.6*.4+.4*.4*.4*.6

ok so it is to to do with the order, the first seed can germinate and the other 3 do not or the second seed can germinate and the other 3 do ETC. is this the right logic?

I am still kind of confused on the 4nCr3 . this tells us the different combinations that can be made from 4 objects taking 3 at a time. but in the question we are looking to arrange 4 objects not 3 ( to arrange the 4 seeds )