Rangpur Higher Secondary 2011/1

Problem for Higher Secondary Group from Divisional Mathematical Olympiad will be solved here.
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Please don't post problems (by starting a topic) in the "Higher Secondary: Solved" forum. This forum is only for showcasing the problems for the convenience of the users. You can post the problems in the main Divisional Math Olympiad forum. Later we shall move that topic with proper formatting, and post in the resource section.
BdMO
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Rangpur Higher Secondary 2011/1

Unread post by BdMO » Wed Feb 02, 2011 9:05 pm

Problem 1:
After tossing some coins, it is observed that the probability of obtaining $10$ heads and $15$ tails is the same as the probability of obtaining $15$ heads and $10$ tails. Find the least number of coins tossed.

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Moon
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Re: Rangpur Higher Secondary 2011/1

Unread post by Moon » Tue Feb 15, 2011 7:41 pm

$25$
"Inspiration is needed in geometry, just as much as in poetry." -- Aleksandr Pushkin

Please install LaTeX fonts in your PC for better looking equations,
learn how to write equations, and don't forget to read Forum Guide and Rules.

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