So let the three 3 colours be R, B and G,
R B R B
B R B R
and so on, while the R and B can switch spots => 2 ways
Since 3 colours must be painted at least once, we must find more cases like above
since this applies to any 2 colours, there are 3C2 ways to choose the colours
hence: total ways =...
School is start just outside top 100, usually around 70
Rank
Chemistry 2/40
Physics 1/64
ESL 1/44
Extension maths 5/41
Extension II maths 3/14
Half yearly marks are
Chemistry: 63/70
Physics: 66/70
4U: 94%
3U: 90%
Term 3 math marks
4U: 97%
3U: 98%
School is start just outside top 100, usually around 70
Rank
Chemistry 2/40
Physics 1/64
ESL 1/44
Extension maths 5/41
Extension II maths 3/14
Half yearly marks are
Chemistry: 63/70
Physics: 66/70
4U: 94%
3U: 90%
Term 3 math marks
4U: 97%
3U: 98%