In Roald Dahl's 'Charlie and the Chocolate Factory', how many golden tickets did Willy Wonka hide in his chocolate bars?

Charlie and the Chocolate Factory is a 1964 children's book by British author Roald Dahl. The story features the adventures of young Charlie Bucket inside the chocolate factory of eccentric chocolatier Willy Wonka.

Willy Wonka, the owner of the Wonka chocolate factory, has suddenly decided to open the doors of his factory to five children and their parents after 10 years of keeping it sealed because his rivals were stealing his recipes. In order to choose who will enter the factory and also receive a lifetime supply of chocolate, Mr. Wonka hides five golden tickets in the wrappers of his Wonka chocolate bars. The search for the five golden tickets is fast and furious. Each ticket find is a media sensation and each finder becomes a celebrity. The first four golden tickets are found by the gluttonous Augustus Gloop, the spoiled and petulant Veruca Salt, the gum-addicted Violet Beauregarde, and the TV-obsessed Mike Teavee.

One day, Charlie sees a fifty-pence coin (dollar bill in the US version) buried in the snow. He decides to use a little of the money to buy himself some chocolate before turning the rest over to his mother. He buys two bars, and after unwrapping the second chocolate bar, Charlie finds the fifth golden ticket. The next day is the date that Mr. Wonka has set for his guests to enter the factory.