The company that manufactures a popular ice-cream is running a promotion. The company claims

that 1 in 6 of its ice-creams contains a stick that gives the owner a free ice-cream.

a) Tilly says: "I am going to buy 6 ice-creams. One of them will de nitely be a winner." Discuss the validity of Tilly's statement.

b) Cody says: "I bought 5 ice-creams last week and none of them were winners, so there is a

really high chance that the next one will be a winner." Is he correct?

c) Lucy says: "I bought 6 ice-creams last week and all of them were winners." Is this possible?