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SSC CGL 10 Aug 2017 Shift 1 Paper

Directions (Q.Nos. 72-75) The table given below shows the ratio of exports and imports of a country for 5 years.

Total trade = Exports + Imports

Question : 75 of 100

Marks: +1, -0

Solution:

Import of year 1

= 3800 \times \frac{9}{19} = 1800

Export of year 1

= 3800 \times \frac{10}{19} = 2000

Import of year 2

= 3600 \times \frac{7}{18} = 1400

Export of year 2

= 3600 \times \frac{11}{18} = 2200

Import of year 3

= 2800 \times \frac{3}{7} = 1200

Export of year 3

= 2800 \times \frac{4}{7} = 1600

Import of year 4

= 3900 \times \frac{8}{13} = 2400

Export of year 4

= 3900 \times \frac{5}{13} = 1500

Import of year 5

= 5000 \times \frac{13}{25} = 2600

Export of year 5

= 5000 \times \frac{12}{25} = 2400

Average import =

\frac{1800 + 1400 + 1200 + 2400 + 2600}{5}

= \frac{9400}{5} = 1880

Average export

= \frac{2000 + 2200 + 1600 + 1500 + 2400}{5}

= \frac{9700}{5} = 1940

∴ Required difference

= 1940 - 1880 = 60

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