Flipping Coins

Probability Level 1

I have 17 coins and I flip them all at once. What is the probability that I have an equal number of heads as tails?

Express your answer as n % n\% . Enter n n .


The answer is 0.

Arul Kolla by Arul Kolla , 30, USA

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2 solutions

Kenny O.
Apr 15, 2017

For there to be a chance of getting an equal number of heads and tails, there must be an even number of coins thrown, 17 is odd not even.
Thus, there is a 0% chance.

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Arul Kolla
Apr 11, 2017

Assume this was possible. Then there would be 17 2 \frac{17}{2} heads, which is not a whole number! Thus, this is not possible, so the answer is 0 \boxed{0} .

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Actually, this is not true, as one of them could have landed on its side.

Siva Budaraju - 4 years ago

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