I think I did the right thing in part a) But I'm not sure about part b) please help

8. To promote tourism, your town stocks a pond of 500 bass to add to the existing population of other species. Later, a researcher samples 50 of the fish to make an estimate of the total population. a) What is the estimate of the fish population if the researcher catches ten bass? [T3 marks] ease ra 8= 50 ( x ) = 50 (500 ) A = 500 n= 10 e ( ) = 2500 b) Using the researcher's data, the town council decides to promote fishing by claiming that "one in five fish caught is a bass" and, if this is not your experience, offering to return your fishing licence fee. What is the expected value of the fees collected for this promotion if a fishing licence costs $50? [T4 marks] 9. True/ False Indicate whether the statement is true or false. [C5 marks] F1. A probability distribution shows the probabilities of all possible outcomes of an experiment