Total number of candidates qualified from all the states together in 1997 is approximately what percentage of the total number of candidates qualified from all the states together in 1998?

Central angle of 108° =	❨	108	x 100	❩	% of the total expenditure
		360

= 30% of the total expenditure.

From the pie chart it is clear that:

Binding Cost + Transportation Cost	= (20% + 10%) of the total expenditure
	= 30% of the total expenditure.

∴ Binding Cost and Transportation Cost together have a central angle of 108°.

Let the Promotion Cost for this edition be Rs. p.

Then, 25 : 10 = 56250 : p     ⟹     p = Rs.	❨	56250 x 10	❩	= Rs. 22,500.
		25

Clearly, S.P. of the book = 105% of C.P.

Let the selling price of this edition (of 12500 books) be Rs. x.

Then, 15 : 105 = 281250 : x     ⟹     x = Rs.	❨	105 x 281250	❩	= Rs. 1968750.
		15

∴ S.P. of one book = Rs.	❨	1968750	❩	= Rs. 157.50 .
		12500

Central angle of 18° =	❨	18	x 100	❩	% of the total expenditure
		360

= 5% of the total expenditure.

From the given chart it is clear that:

Out of the given combinations, only in combination (d) the difference is 5% i.e.

Paper Cost - Printing Cost	= (25% - 20%) of the total expenditure
	= 5% of the total expenditure.

Printing Cost of book = 20% of C.P.

Royalty on book = 15% of C.P.

Difference = (20% of C.P.) - (15% of C.P) = 5% of C.P.

∴ Percentage difference	=	❨	Difference	x 100	❩	%
			Printing Cost
	=	❨	5% of C.P.	x 100	❩	% = 25%.
			Printing Cost

Required average	= 8100 + 9500 + 8700 + 9700 + 8950 5
	= 44950 5
	= 8990.

The percentages of candidates qualified to candidates appeared from State P during different years are:

For 1997	❨	780	x 100	❩	% = 12.19%.
		6400

For 1998	❨	1020	x 100	❩	% = 11.59%.
		8800

For 1999	❨	890	x 100	❩	% = 11.41%.
		7800

For 2000	❨	1010	x 100	❩	% = 11.54%.
		8750

For 2001	❨	1250	x 100	❩	% = 12.82%.
		9750

∴ Maximum percentage is for the year 2001.

Required percentage	= (840 + 1050 + 920 + 980 + 1020) x 100 % (7500 + 9200 + 8450 + 9200 + 8800)
	= 4810 x 100 % 43150
	= 11.15%

Required percentage	= (850 + 920 + 890 + 980 + 1350) x 100 % (7400 + 8450 + 7800 + 8700 + 9800)
	= 4990 x 100 % 42150
	= 11.84%.

Required percentage	= (1020 + 1240) x 100 % (8800 + 9500)
	= 2260 x 100 % 18300
	= 12.35%.