4 D 71754

31. Examine whether the matrix A is non-singular or not :

1 2 3
A= 3 6 9
2 4 6

32. Explain the graphical method of obtaining the Median.

(6 x 5 = 80 marks)
Section D (Essay Type)
Answer any two Questions,
Each question carries 12 marks.
33. Compute arithmetic mean, median and mode from the following data and verify the relation between
them ?
Class : 0-10 10-20 20-30 30-40 40-50 60-60 60-70 70-80 80-90
Frequency ध 2 4 10 15 22 18 12 8 5
34. Explain skewness. Find the quartile coefficient of skewness for the following data :
Class 0-5 5-10 10-15 28-20 20-25 25-30 30-35
Frequency 3 3 10

14 25 17 9 2
35. Solve the simultaneous equations :

ന X-Y=6and x24 y? -68.
(0) X+Y=49 and x? 213 2178.

36. ೫/೧6 45 , 4۸2-۸ - 191 where

1 2 5
A= 2 3 4
4 6 8

(2 12 - 24 marks)