Whitworth, William Allen 1840-1905. Choice and chance : with one thousand exercises / by William Allen Whitworth. - 5th ed. - Newyork : Hafner Publishing Co., 1959. - viii, 342 p. ; 20 cm. - Cambridge mathematical series . - Cambridge mathematical series . Subjects--Topical Terms: Probabilities.Permutations.Combinations.Partitions (Mathematics) Dewey Class. No.: 519 / WHC 1959