hey
just facing a dilemma between sources that contradict each other.
in the chemistry of dry cell what is the oxidation and the reduction reactions?
thx
o i think they are the 'old' posts.
the old posts are the posts before bos got hacked or something which caused it to shutdown.
those posts are just liek that unfortunately..
:/
Is the hsc bio better than the prelim bio. I respect biology as a great subject, but i noticed that the hsc bio topics are so much better than the prelim topics.
Can i have some other opinions?
It is given that 3 hotels must be occupied.
Since Joanne and David are always staying together they are to be counted as 1 unit. There are three other ppl left, so together there are 4units.
so in nPr, n=4 and r=3.
Then the number of possibilities is 4P3.
However, there are 4 units and 3...