Direct Method

The following table shows marks in English secured by students of Class X in your school in their examination. Calculate mean marks using Direct Method. {:("Marks",0-10,10-20,20-30,30-40,40-50),("Number of Students"," "20," "24," "40," "36," "20):}

Calculate weighted mean of the following data by using Direct and Short-cut Methods: {:("Items",81,76,74,58,70,73),("Weight",2,3,6,7,3,7):}

Direct halogenation of alkane is NOT a suitable method for the preparation of alkyl halides because_______.

Introduction|Data|Collection Of Data|Types Of Data|Presentation Of Data|Statistics|Measure Of Central Tendency|Mean Of Ungrouped Data|Mean Of Grouped Data|Methods To Find Mean Of Grouped Data|Question (Direct Method)|OMR

Assertion: Gene gum method is a direct gene transfer method. Reason :In this method foregin gene directly introduce in target cell without involving vector DNA