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So would you be able to come up with an estimate for the total?

And ... how much work do think think you will have spent in total on Ext 2 only by the time it is all over?

Re: 2015 permutation X2 marathon I have been considering the simplified case of placing n people into n committees with 2 people in each committee and each person in 2 committees. I have noticed a pattern - but it is a pattern of TWO only, so there is a good chance it means nothing. For 3...

Re: 2015 permutation X2 marathon That can be reduced to 3: (1) The number of people, m (2) The number of committees, n (3) The number of connections (which must be a multiple of m and n - not necessarily the LCM)

Re: 2015 permutation X2 marathon I was doing it a different way, and I finally got 90. The reason for my other method was that I then wanted to up the numbers. So ... how would you do it if there are 6 people to be placed in 6 committees, with each person on exactly 3 committees and each...

Students in year 12 will be able to do much better in a year 9 Naplan that when they were in year 9. Doing the test in year 12 is not a good indicator.

Re: 2015 permutation X2 marathon I'll check your answer tomorrow, but I was getting 87.

Re: 2015 permutation X2 marathon * Andy, Ben. Charlie and Dick are to be allocated to 4 committees - Advertising, Finance, Planning, and Subterfuge. Each committee is to contain exactly two people, and each person is to be on exactly two committees. In how many ways can the committees be...

It depends what you are aiming for, and what your natural ability is. Some have a real gift for the subject and can get a great result with minimal effort. I would say that someone who DOESN'T get a band 10 (the top band) in year 9 Naplan would probably need double that to get an E4.

The top students would spend a lot more time than that on Ext 2, especially since you are counting lesson time. After at least 75 hours of lessons, that leaves only about 20 minutes of work per day over the course of the year.

I expect almost all Ext 2 students would get a much lower Ext 2 raw mark than Ext 1. That is the point I was trying to make, and I asked you merely because I expected you would be typical in that regard. F knows where your attitude is coming from.

Re: What is the difference between addition and multiplication in this probability qu For EACH choice of letters, there are 4 choices of numbers. Since there are 6 ways of choosing the letters, there are 6 x 4 ways of choosing the ID

So how did your 4U raw mark compare to your 3U raw mark?

Unfortunately, there isn't anything I can do about that.

Only one problem with that - there is no god.

Here are 16 selective school 2015 Ext 1 trials: https://drive.google.com/folderview?id=0Bw6Jsw5hm__LfmVsLWJIT2VkRmFwa00zVzBBa21WT21KRkdsbVVsbDJRQml4WnFwbFRPWXc&usp=sharing

Here are 17 selective school 2015 trials: https://drive.google.com/folderview?id=0Bw6Jsw5hm__LfmRoWk9RZ2Q5dlQtb1FXU3FUS3BIbW5zWkRYX2ctWXdzbE1VY3ppQ0tQWjQ&usp=sharing

You'd better hurry - the assessment marks are due in to BOSTES tomorrow.

Re: HSC 2015 3U Marathon A more symmetrical calculation: 5C3 × (2/3)³ × (1/3)² + 5C4 × (2/3)^4 × (1/3)^1 + 5C5 × (2/3)^5 × (1/3)^0

When did "maths" become a verb?