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  1. goobi

    Permutations

    Thank you so much for the excellent explanation :)
  2. goobi

    Permutations

    Question: Find the total number of even numbers greater than 500 but less than 4000 which can be formed using the digits 1, 2, 3, 4, 5, 6 if NO digit can be repeated in any number. Thanks for any help!
  3. goobi

    Permutations

    Thank you so much! I got it now!!! :)
  4. goobi

    Permutations

    Thank you so much! But I'm interested in how it works with permutations. Can you, or anyone please explain it?
  5. goobi

    Permutations

    Question: Find the number of code words involving 4 distinct letters chosen from the letters in the word forest (a) if there are no restrictions (b) if no code word contains both the letters R and S. (a)Solution: 6P4=360 (I got this one) However I'm stuck with part (b). (b)Solution: 360 -...
  6. goobi

    A question on Probability

    The suggested answer is found by "1 - P(winning no prize)", so the solution assumes that "winning a prize" implies "winning at least one prize".
  7. goobi

    A question on Probability

    I'm really afraid of the presence of this type of question in the HSC and the trial as I think I'm a bit disadvantaged for English being my second language...
  8. goobi

    A question on Probability

    Thanks...but why would it be "winning at least one prize"? If so, it implies that the event "winning all 2 prizes" is a subset of "winning a prize" as said in the question, which I think is a bit literally contradicting...
  9. goobi

    A question on Probability

    So which one, "winning exactly one prize" or "winning at least one prize", do you think is what the question asking for?
  10. goobi

    A question on Probability

    A girl has 5 tickets in a raffle in which there are 2 prizes and 40 tickets sold. Find the probability of her winning a prize. So, I'm just wondering whether "winning a prize" actually means "winning exactly one prize" or "winning at least one prize". Thanks for any help!
  11. goobi

    Should English be compulsory??

    IMO English should be compulsory simply because Australia is a mainly English-speaking country. It's like Chinese is compulsory in China, French is compulsory in France...
  12. goobi

    Whats your fav subject right now?

    Re: Whats your fav. subject right now ? English and Legal Studies :)
  13. goobi

    Japan hit by 8.9 earthquake then tsunami

    Pray for all my cousins there.
  14. goobi

    SUTHERLAND SHIRE TUTORING - 97.00 2010 ATAR - English, Eco, Business, Anc His, Legal

    Re: SUTHERLAND SHIRE TUTORING - 97.00 2010 ATAR - English, Eco, Business, Anc His, Le Please check your email inbox. I sent you a email a few days ago. Thanks!!
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