What is the ratio between the total production of all the three brands of laptops in the year 2007 and 2010?
A
91 : 45
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B
45 : 91
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C
45 : 92
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D
12 : 13
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E
None of these
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Solution
The correct option is C 45 : 92 Total production in 2007 = 100 + 150 + 200 = 450 thousands Total production in 2010 = 250 + 320 + 350 = 920 thousands Required ratio = 450 : 920 = 45 : 92