A 9th class has 15 boys and 30 girls. Two representatives are to be selected at random from the class. Find the probability that, (i) the first representative is a girl.
(ii) the second representative is a girl, given that the first representative is a boy.
(iii) first is a boy and second is a girl.
(iv) a girl and a boy is selected as representatives.

Which statement below best describes george waring's approach to solving the problems of water-borne illness? a. waring is going with his "gut," because he believes that instincts and emotions are the best guides for action. b. waring efficiently and thoroughly lays out the case for why the problems are too large and overwhelming to be solved: people should just move out of cities back to their farms. c. waring has gathered the testimonies of people who live in densely populated areas in order to learn how they themselves have solved their problems. d. waring exhibits the industrial age's increased respect for and reliance on science and the scientific method.

Dan wants to start a supermarket in his hometown, and wants to get into the business only after finding out about the market and how successful his business might be. the best way for dan to gain knowledge is to:

Alinguist had a gross income of 53,350 last year. if 17.9% of his income got witheld for federal income tax, how much of the linguist's pay got witheld for federal income tax last year?