There are more than 300 built-in functions in Excel 2010, from Aggregate to Z.Test. The question is which ones will make my work easier? How and why should I use a particular function in my formulas? Excel Formulas and Functions for Dummies, Third Edition is a thorough but easy-to-read coverage of powerful Excel functions. This book gives detailed step-by-step instruction on Excels 150 most useful functions. The use of each function will be illustrated by helpful, real-world examples showing how a function is used within a formula.