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    Question

    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.

    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?
    A Less, 7.81% Correct Answer Incorrect Answer
    B More, 10.51% Correct Answer Incorrect Answer
    C More, 7.81% Correct Answer Incorrect Answer
    D Less, 10.51% Correct Answer Incorrect Answer

    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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