18.
19.

20.

21.

22.

23.

24.

25.

26.

27.

28.

29,

Define diagonal matrix with an example.

Define rank of a matrix.
3 4 2

Show that A=|0 1 -3 | 18 non-singular.
2 -2 8

The mean wage of 100 labourers working in @ factory running he a“ ர १०५९ 40 wor mp
respectively is Rs. 38. The mean wage of 60 labourers working 1n the morning shift is Rs. 40. Find
the mean wage of labourers working in the evening shift.

Define standard deviation and coefficient of variation.

Explain Scatter diagram.

In the study of regression equations, following values are obtained : ಶ್ರಿ ೫0.257 ೬0.420 4,
find o,.

(10 x 2 = 20 marks)
Section C (Short Essay/Problem Type)

Answer any six questions.
Each question carries 5 marks.

2 18 _1 15
Find the value of =) «ie |
4) + 4 33 8

24,395 x(3.16)° न
8.79 ing logarithm.

Evaluate

Demand for goods of an industry is given by the equation pg = 100 where p is the price and q is

the quantity. Supply is given by the equati
quantity ? quation 20 + 8p = g. What is the equilibrium price end

+ १9 0 9 - find AB and BA. Show that AB «BA.

The cost of manufacturing and selling a tin
cost of Rs. 900. Each is sold out for Rs. 20

function ; (iii) Profit function - ೧
manufactured and sold ? + GY) What i