Question
The combined average production for four years of
companies A and C is what percentage (rounded off to 2 decimal places) more/less than the combined average production for four years of companies B and D? The bar graph below shows the production of coffee (in lakh tons) by four companies A, B, C and D over a period of four years from 2010 to 2013. Study the graph and answer the question that follows.Solution
From the chart: A total = 60+90+140+220 = 510
C total = 50+190+180+250 = 670
A+C total = 510+670 = 1180 → Average = 1180/4 = 295
B total = 70+100+150+210 = 530
D total = 120+170+200+260 = 750
B+D total = 530+750 = 1280 → Average = 1280/4 = 320
Percentage difference = ((295 - 320) / 320) × 100 = -7.81%
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