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ok BillyMak, let me be a neutral third party... I agree with Danny. The Q says "Calculate the probaibility that the jackpot prize will exceed $200 000 when it is finally won." So you need to NOT win for at least 25 times. And you need to win for the 26th time or in any of the next draw...

and Sirius Black knows about inspection. He's just pretending....

type inspection in google!!! learn to use search engine maths pros only do questions based on inspection and im trying to join the club although... im definitely not as pro as the pros in this forum estimated mark of 80-90/120 in ext2 whilst they have about... >115/120 *cry* well...

what? the original question (assuming typed correctly) said: "If the acceleration of the paritcle is at a constant rate -9.8m/s/s" if it's da/dt then it should say "If the acceleration of the paritcle is changing at" and the unit should be m/s/s/s

yes u r allowed but I didn't used it it'll make it easier though :p if you're interested with my method: it's based on inspection(tm) go learn now ;)

by inspection(tm): n=2/root3 T=2pi/n = pi root3 a=4 :p

This should be fraction: (12-k) * 8 > 1 k + 1 * 15 move 15(k+1) to the right, knowing that 15(k+1) is a positive number so you don't need to worry about changing inequality sign. 8(12-k) > 15(k+1) 96-8k>15k+15 -23k>-81 k<-81/-23 (change inequality because you're dividing by negative...

7! - 2*6! if you prefer this method 7! if the boys can sit anywhere the first 6! is when boy2 sits to the right of boy1 the second 6! is when boy2 sits to the left of boy1 left and right matters even though it's in a circle I just sort of found this out :p Position or order is relative...

is it just asking for how many ways they can be seated? if it's two particular boys from the 3 of them, no of ways = boy1 * boy2 * everyone else = 1 * 5 * 6! boy1 can be seated in 1 way because it's in a circle so the first person essentially can sit in one way only. boy2 is 5 because he...

I wonder if that approach comes from non-HSC experience ;) hmm.. but it can be from 2U and/or ext2... anyway the more ext1-ish way of doing these 2 questions would be: "five cards are drawn at random from a pack of 52 playing cards. what is the probability that they are all from the same...

use the link from smallcattle!! its on boREd of studies, not boARd

if you want to get 100% tomorrow, YES! I've got a lot of stuff to catch up on... these numerous inspection techniques are crazy...

if u meant u still dont know why order is important: you're arranging 7 books on the shelf... placing book A on the very left near the door is different from placing it on the other side... 6c4*5c3*7!: 6C4 to select 4 physics books to be picked up and put in a temporary box before...

hahaha... look at the magical nPr : ⁿP_r ;)

well since u said :p I dont think I can explain it :p its just one of those inspection techniques. u need to learn how to do inspection. its one of those secrets to success in the HSC maths course. http://www.google.com.au/search?hl=en&q=inspection&meta=

6c4*5c3*7! 6p4*5c3*4!

how do you view the answer from there? no matter which yellow button I click it leads to the question. I need to go to http://www.boredofstudies.org/mirror/Standards/2001/MATH/EXT1/

I'll give the link: http://www.boredofstudies.org/community/showthread.php?t=42506 But I should clarify that it's totally useless. There's nothing there :( You can try to PM icxdragon who posted there.

well for the case where it's (a-bx)^n, x>0, find the one with greatest absolute value (this is the Tk+1, not Tk), then check if its negative or positive. if its positive then its the greatest. if its negative, find the thing before and after it and compare which one is greater. u said...

probability :( the name itself implies that theres no certainty in the answer I dont mind 3U algebra mess