Probability of choosing a card that has an even number on it 
<em><u>Explanation </u></em>
<u>Cards:</u> 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
There are total 17 cards and we are choosing only one card randomly which has even number on it.
<em>The even number cards are: </em>2 4 6 8 10 12 14 16
That means there are total 8 even number cards.
So, Probability of choosing a card that has an even number on it 