Ques no 11and 12

Ques no 11and 12 A Obtained Number students 2 Find the mean deviation about the mean for the following data Marks obtained 10-20 20-30 30-40 40-30 M) -70 70 - Number students 2 12. Find mean dewiation about the median for the following data : 12- 6- 12 10-20 20-30 50-60 0) Class interval Frequency Class 0-6 30 - 40 40-30