I am in need of help for question 6 (ii) and (iii)
(ii). I looked at the mark scheme and I don't understand why the students are 5! and not 7P3 (because there are 7 window seats available and 5 different students) and I just don't plain understand the bit on Mr and Mrs Brown and Lin (how does the 3P2 come into the picture? =/)
(iii). I don't get it
Can anyone please help explain this to me?
(ii). I looked at the mark scheme and I don't understand why the students are 5! and not 7P3 (because there are 7 window seats available and 5 different students) and I just don't plain understand the bit on Mr and Mrs Brown and Lin (how does the 3P2 come into the picture? =/)
(iii). I don't get it
Can anyone please help explain this to me?