In a box there are cards numbered as 47, 48, 49, ........., 81 and 82 (one number on one card). A card is drawn at random from the box. What is the probability that the number on the card drawn is a prime number?
1
\(1\over 6\)
2
\(7 \over 36\)
3
\(2\over 9\)
4
\(5 \over 36\)