1. The problem statement, all variables and given/known data (Answers: (a) 0.3233 (b) 2 (c)(i) 0.6489 (c)(ii) 0.1669 (c)(iii) 0.2369) 2. Relevant equations Formulae for Discrete Probability Distributions 3. The attempt at a solution I don't know how to solve part (b) only. For (b), I have no idea. Is it using the Geometric Progression (a / (1 - r))? Can anyone tell me how to solve it? Thank you very much!