Bar Chart - Study Mode

[#21] The average export of pearls for the given period (in Rs. crores) was ?
Correct Answer

(B) 8.73 crores

Explanation

Solution: Average export of pearls over the period $$ = left{frac{1}{7}left(5.2+6.5+7.8+9.9+10.8+9.5+11.4
ight)
ight} ext{crores}$$ $$eqalign{
& = frac{61.1}{7} ext{ crores} cr
& = 8.728 ext{ crores} cr
& = ext{Rs. }8.73 ext{ crores} cr} $$

[#22] In which of the following pairs of years was the average export of pearls around Rs. 9 crores?
Correct Answer

(B) 2003 and 2004

Explanation

Solution: $$eqalign{
& ext{Average export in 2003 and 2004} cr
& = frac{7.8+9.9}{2} ext{ crores} cr
& = frac{17.7}{2} ext{ crores} cr
& = ext{Rs. }8.85 ext{ crores} cr
& approx ext{Rs. }9 ext{ crores} cr} $$

[#23] In which year was there maximum percentage increase in export of pearls to that in the previous year?
Correct Answer

(D) 2004

Explanation

Solution: $$eqalign{
& ext{Increase % in various years} cr
& 2002 → left{frac{left(6.5-5.2
ight)}{5.2} imes100
ight}\% cr
& ,,,,,,,,,,,,, = left(frac{1.3}{5.2} imes100
ight)\% cr
& ,,,,,,,,,,,,, = left(frac{13}{52} imes100
ight)\% cr
& ,,,,,,,,,,,,, = 25\% cr
cr
& 2003 → left{frac{left(7.8-6.5
ight)}{6.5} imes100
ight}\% cr
& ,,,,,,,,,,,,, = left(frac{1.3}{6.5} imes100
ight)\% cr
& ,,,,,,,,,,,,, = left(frac{13}{65} imes100
ight)\% cr
& ,,,,,,,,,,,,, = 20\% cr
cr
& 2004 → left{frac{left(9.9-7.8
ight)}{7.8} imes100
ight}\% cr
& ,,,,,,,,,,,,, = left(frac{2.1}{7.8} imes100
ight)\% cr
& ,,,,,,,,,,,,, = left(frac{21}{78} imes100
ight)\% cr
& ,,,,,,,,,,,,, = 26.9\% cr
cr
& 2005 → left{frac{left(10.8-9.9
ight)}{9.9} imes100
ight}\% cr
& ,,,,,,,,,,,,, = left(frac{0.9}{9.9} imes100
ight)\% cr
& ,,,,,,,,,,,,, = left(frac{9}{99} imes100
ight)\% cr
& ,,,,,,,,,,,,, = frac{100}{11}\% cr
& ,,,,,,,,,,,,, = 9.090\% cr
cr
& 2007 → left{frac{left(11.4-9.5
ight)}{9.5} imes100
ight}\% cr
& ,,,,,,,,,,,,, = left(frac{1.9}{9.5} imes100
ight)\% cr
& ,,,,,,,,,,,,, = left(frac{19}{95} imes100
ight)\% cr
& ,,,,,,,,,,,,, = 20\% cr
& cr } $$ Clearly, the maximum increase was in 2004

[#24] Directions (1 - 4) The following bar chart gives the growth percentage in the number of households in middle, upper-middle and high-income categories in the four regions for the period between 1987-88 and 1994-95.
Correct Answer

[#25] Which region showed the highest growth in number of households in all the income categories for the period ?
Correct Answer

(B) South

Explanation

Solution: From graph it is clear that southern region showed the highest growth in number of households in all the income categories for the period.