The following table shows the age-wise brand ownership of mobile phone handsets.
If a total of 5000 ‘C’ mobile phone sets are sold till date, then how many are more than one year old?
Number of mobile phone sets are sold till date = 5000
Percentage mobile phone sets are sold more than one year old = 10 + 10 + 70 = 90%
= 5000 $$\times \frac{90}{100} = 4500
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