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.

## Rangpur Higher Secondary 2011/1

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### Re: Rangpur Higher Secondary 2011/1

"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.

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.