At a funfair, Amy pays $1 for two attempts to make a bell ring by shooting at it with a water pistol. • If she makes the bell ring on her first attempt, she receives $3 and stops playing. This means that overall she has gained $2. • If she makes the bell ring on her second attempt, she receives $1.50 and stops playing. This means that overall she has gained $0.50. • If she does not make the bell ring in the two attempts, she has lost her original $1. The probability that Amy makes the bell ring on any attempt is 0.2, independently of other attempts.