Question

यदि 10 संख्याओ का माध्य 20 है तो प्रत्येक संख्या से 2 घटाने पर नया माध्य क्या होगा?

Answer 1

There is theorem ,If the mean of an observation X1 ,X2,.... x10 if each observation is decreased by P the mean of the new observation is x minus p So mean =20-2=18