Answer
41 are not known by me of which 37 are in the deck. Among the 41 cards that I do not know 8 are club cards.
Work Step by Step
Each of the five players received 3 cards: 15 cards in the total. There are 37 cards in the deck.
I can see my three cards and two of the others four players, that is, eleven cards are known by me and 41 are not known by me.
I have three clubs and I can see another two clubs. So, there are another eight club cards.
