Science and Education Publishing Turkish Journal of Analysis and Number Theory 2 3 2014 06 29 On an Inequality of Ostrowski Type via Variant of Pompeiu's Mean Value Theorem 80 84 EN Mehmet Zeki SARIKAYA Department of Mathematics, Faculty of Science and Arts, Düzce University, Düzce, Turkey Hüseyin BUDAK TJANT2014235 10.12691/tjant-2-3-5 2014 06 17 2014 06 26 2014 06 29 The main of this paper is to establish an Ostrowski type inequality for two variables functions by using a mean value theorem.