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When a dice is thrown once, find the probability of getting an even number.
As known, when a dice is thrown there are six possible outcomes,
$( 1,\ 2,\ 3,\ 4\ ,5\ ,6)$
And we know $( 2,\ 4\ ,\ 6)$ are even numbers.
$\therefore $ Numbers of favourable outcomes$=3$
As known probability of favourable outcomes$=\frac{number of favourable outcomes}{Number of total possible outcomes }$
$\therefore $ Probability of getting an even number$=\frac{number of favourable outcomes}{Number of total possible outcomes }$
$\mathbf{=\frac{3}{6} =\frac{1}{2}}$
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