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The ratio of the number of remote and communication satellites launched by Canada is 3 тИ╢ 2. Find the number of communication satellites launched by Canada. (Consider only remote and communication satellites launched by Canada)
800
780
750
720
None of the above
720
Calculate Canada's total (15% of 12000 = 1800). Divide by sum of parts (3+2=5) to get 1 unit = 360. Communication part is 2 units, so 2├Ч360=720.
Total satellites launched = 12000. Canada contributes 15% of the total (from the provided pie chart). The ratio of remote to communication satellites for Canada is 3 : 2.
Communication┬аSatellites=Canada┬аTotal├ЧSum┬аof┬аRatio┬аPartsRatio┬аPartтАЛ
Calculate Canada's total (15% of 12000 = 1800). Divide by sum of parts (3+2=5) to get 1 unit = 360. Communication part is 2 units, so 2├Ч360=720.
Confusing the number of satellites with the percentage value or failing to identify the correct pie chart segment for Canada.
Find Total Satellites for Canada
From the pie chart, Canada's share is 15%. Total number of satellites is 12000.
Canada┬аTotal=12000├Ч15%=12000├Ч0.15=1800
Divide based on the ratio
The ratio of remote satellites to communication satellites is 3 : 2. Sum of ratio parts = 3 + 2 = 5.
Total┬аParts=3+2=5
Calculate number of communication satellites
Communication satellites represent 2 parts out of 5.
Communication┬аSatellites=1800├Ч52тАЛ=360├Ч2=720
D is correct because 15% of 12000 is 1800, and 2/5 of 1800 equals 720.
Always ensure you identify the total population before applying ratios, as neglecting the percentage contribution first is a common error in Data Interpretation questions.
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