Math question (P/C) help

Lohhwee SG

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 SG

Hi,

The given answer is wrong. Thanks.

Cheers,
Wen Shih

Lohhwee SG

Hi,

Can this question be solved then?

Thanks.

[email protected]_Devils.com SG

The working to part b is

30×30 = 900

wee_ws SG

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 SG

Hi,