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The total number of gel pens sold by shops A and B together is what percentage of the total number of ball point pens sold by shop B?
100%
50%
80%
120%
None of the above
120%
Calculate the sum (30+30=60), then find what fraction 60 is of 50. Since 60 is more than 50 (100%), look for values greater than 100%.
From the graph, number of gel pens sold by shop A = 30, gel pens sold by shop B = 30, and ball point pens sold by shop B = 50.
Percentage=(Ball┬аpoint┬аpens┬аBSum┬аof┬аgel┬аpens┬аA┬аand┬аBтАЛ)├Ч100%
Calculate the sum (30+30=60), then find what fraction 60 is of 50. Since 60 is more than 50 (100%), look for values greater than 100%.
Confusing the data points between ball point pens (square marker), gel pens (filled circle), and fountain pens (triangle marker).
Identify values from the line graph
Extract the values for gel pens (filled square) for shops A and B, and ball point pens (filled circle) for shop B.
Gel┬аpens┬аA=30,Gel┬аpens┬аB=30,Ball┬аpoint┬аpens┬аB=50
Calculate the total number of gel pens
Sum the gel pens sold by shop A and shop B.
Total┬аGel┬аPens=30+30=60
Calculate the required percentage
Divide the total number of gel pens by the number of ball point pens sold by shop B and multiply by 100.
Percentage=(5060тАЛ)├Ч100%=1.2├Ч100%=120%
D is correct because the total number of gel pens sold by shops A and B is 60, and 60 is 120% of the 50 ball point pens sold by shop B.
Always verify the legend or markers before reading values from multi-series line graphs, as markers like squares and circles are frequently transposed by test-takers.
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