# A coin is tossed 2n times. The chance that the number of times one gets head is not equal to the number of times one gets tails is

Question : A coin is tossed 2n times. The chance that the number of times one gets head is not equal to the number of times one gets tails is

(A) $\dfrac{\left( 2n!\right) }{\left( n!\right) ^{2}}\left( \dfrac{1}{2}\right) ^{2n}$

(B) $1-\dfrac{\left( 2n!\right) }{\left( n!\right) ^{2}}$

(C) $1-\dfrac{\left( 2n!\right) }{\left( n!\right) ^{2}}\dfrac{1}{4^{n}}$

(D) none of these