Presentation of Data — Economics STD 11 Commerce — Question

The following table gives the daily income of ten workers in a factory. Find the arithmetic mean.

Workers	A	B	C	D	E	F	G	H	I	J
Daily Income (in ₹)	120	150	180	200	250	300	220	350	370	260

The following table shows the estimated sectoral real growth rates (percentage change over the previous year) in GDP at factor cost.

Year	Agriculture and allied sectors	Industry	Services
1994-95	5.0	9.2	7.0
1995-96	-0.9	11.8	10.3
1996-97	9.6	6.0	7.1
1997-98	-1.9	5.9	9.0
1998-99	7.2	4.0	8.3
1999-2000	0.8	6.9	8.2

Represent the data as multiple time series graphs.

Why is production possibility curve concave?

How is price determined in the market?

Distinguish between normal good and inferior good.

Giving reasons, Identify the equilibrium level of output and find profit at this output using Marginal Cost and Marginal Revenue approach from the following table:

Output (units)	1	2	3	4	5
Total Revenue (Rs.)	10	20	30	40	50
Total Cost (Rs.)	12	22	30	40	52

Prepare 'less than’ cumulative frequency series:

Marks	0-10	10-20	20-30
Number of Student	4	6	10

Summit has ₹90 with him. He intends to purchase goods X and Y with his money. The market price of X and Y per unit is ₹10. The marginal utility schedule of goods X and Y is given below. Find out how many units of X and Y should Summit purchase so that he gets maximum satisfaction.

Units of Commodity	1	2	3	4	5	6	7	8	9	10
MU of X	80	72	64	56	48	40	32	24	16	8
MU of Y	40	32	24	20	16	12	8	4	0	0

What are different sources of Secondary data?

Explain the effect of subsidy on the supply of a good.