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Got the email last week :)

Just wondering what HSC marks for this paper would 64%, 82% and 94% (raw) be aligned to.

5 for comprehension (2 pages for the 5 marker) 5 for creative 6 for essay

A hall has n doors. Suppose that n people each choose any door at random to enter the hall. (i) In how many ways can this be done? (ans= n^n) (ii) What is the probability that at least one door will not be chosen by any of the people? I have no problem with part 1, it's just part 2 that...

Could someone please read over my solutions? Thanks.

So what's the answer? Just double checking.

Question: The region between y=x^2 and y=3x+4 is rotated about x=4. Find the volume formed. (Note that the region is not symmetrical about the y-axis.) When I attempted this question using the cylindrical shell method, I wondered if I had to divide the region into two. Also, it would be...

I got it now thanks heaps :)

So the following is the question that I'm stuck with: A bag contains seven balls numbered from 1 to 7. A ball is chosen at random and its number is noted. The ball is then returned to the bag. This is done a total of seven times. (iii) What is the probability that exactly one of the balls is...

One bag contains 5 blue and 3 yellow balls and another bag contains 7 blue and 2 yellow balls. A bag is chosen at random and a ball drawn out. The result is recorded, then the ball is placed back in the bag. If this is done 20 times, find the probability of drawing out 12 blue balls correct to 3...

In how many ways can 4 boys, including John and Matthew, and 4 girls, including Sally, be arranged in a line if Matthew is between, but not necessarily adjacent to John and Sally? The solution in the back of the book: "The total number of ways to sit 8 people if John, Matthew and Sally stay in...

This question is from the Fitzpatrick textbook: How many arrangements can be made of five letters chosen from the alphabet of 26 letters if no letter may be used twice in one word and no word may start with X nor with YZ in that order? My solution: Number of arrangements which exclude X...

Thanks!

A chessboard has 64 squares arranged in eight rows of eight. The only moves that a King may make are from the square on which he is standing to an adjacent square. Find the total number of moves from all possible positions that the King can make on a chessboard. The answer is 420 moves but I...

Arts/Law at USYD or UNSW

If an essay question goes like this: "Evaluate the effectiveness of the legal and non-legal responses to contemporary issues relating to family law," I wonder if it is necessary to talk about ALL of the four issues i.e. recognition of same-sex relationships, parental responsibility, surrogacy...

So the following is a Conics question from Terry Lee (p.111). I'm just wondering whenever I attempt questions like 7(a) if I can just substitute the x and y values required into the equation given in order to get full marks, provided that we are told to 'prove' rather than 'derive' the...

I just felt like a dumbass when I was around all the smart people at the meat :(

Same... anyways see you tomorrow!

Herro! :)