A deck of cards contains red cards numbered 1, 2, 3, 4, 5, blue cards numbered 1, 2, 3, 4, 5, 6 and green cards numbered 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18. If a single card is picked at random, what is the probability that the card is green?
• Give your answer as a fraction.
Provide your answer below: