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The number of possible outcomes when a coin is tossed 6 times is

$\begin{array}{1 1}(A)\;36\\(B)\;64\\(C)\;12\\(D)\;32\end{array}$

There are 2 possible outcomes head or tail
Tossing a coin 1 time-2 out comes
Tossing a coin 6 times-$2^6$ out comes
$\Rightarrow 2\times 2\times 2\times 2\times 2\times 2$
$\Rightarrow 64$
Hence (B) is the correct answer.