Math question (P/C) help

• Lohhwee

  23 Nov 11, 16:13

  Hi,

  May i know how to solve for part b of this question?

  
  A panel of judges in a Meridian superstar competition has to select and place in order of merit,three winning contestant from a total of 30.
  A)Find the number of ways this can be solved.
  
  B)All 30 contestant are subsequently put into voting by the student population for 2 special titles in which this can be done,assuming that a contestant may win more than one title.
  ans. 184756
  
  Thanks.

• wee_ws

  23 Nov 11, 16:57

  Hi,

    The given answer is wrong. Thanks.

  Cheers,
  Wen Shih

• Lohhwee

  23 Nov 11, 19:43

  Hi,

  Can this question be solved then?

  Thanks.

   

• Cristiano@Red_Devils.com

  23 Nov 11, 20:28

  The working to part b is 30 x 30 = 900
• wee_ws

  23 Nov 11, 21:32

  Hi Lohhwee,

    Regarding the topic of P&C, always ask:

    1. Is the question about combination (just choosing, order is unimportant) or permutation (choosing, then ordering)?

    2. Which principle(s) should be used - addition principle, multiplication principle, mutual exclusion principle?

    It is really that direct :)

    You may read my examples on P&C at:

    http://wenshih.wordpress.com/articles-about-learning-maths

    , in particular, items 23 to 26.

    Thanks.

  Cheers,
  Wen Shih

• Lohhwee

  23 Nov 11, 22:04

  Hi,

   

   Cristiano@red_Devils and Wen Shih, appreciate the answer and guidance.

  
  

  Thanks .
  

  
  

  
  

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