A Primer in Probability, Second Edition - Kathleen Subrahmaniam - Google Books

http://books.google.de/books?id=QDl73OHZ2KwC&pg=PA264&dq=Vandermonde's+identity&lr=&as_brr=3&cd=14#v=onepage&q=Vandermonde's%20i

Somewhat revised/expanded new edition of a problem-oriented introductory undergraduate text, the first edition of which appeared about a decade ago. The author writes with courteous clarity, and imposes only modest demands upon the mathematical skills of…