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The given Bar Graph presents the sale of a particular brand of car by three showrooms, A, B and C (in multiples of 100) during the months Jan, Feb, Mar and Apr, 2016 If the cars sold by A and B are all found to be in perfect order, but the cars sold by C were found to be defective to the extent of 15% 10%, 8% and 6%, respectively in Jan, Feb, Mar and Apr 2016. Then what is the ratio of non-defective cars sold by C to that of all cars sold by A and B during Jan-Mar 2016?

The given Bar Graph presents the sale of a particular brand of car by three showrooms, A, B and C (in multiples of 100) during the months Jan, Feb, Mar and Apr, 2016 If the cars sold by A and B are all found to be in perfect order, but the cars sold by C were found to be defective to the extent of 15% 10%, 8% and 6%, respectively in Jan, Feb, Mar and Apr 2016. Then what is the ratio of non-defective cars sold by C to that of all cars sold by A and B during Jan-Mar 2016? Correct Answer 489 : 1300

Cars sold by A during Jan-Mar 2016 = (3 + 2 + 5) × 100 = 1000

Cars sold by B during Jan-Mar 2016 = (6 + 5 + 5) × 100 = 1600

All cars sold by A and B during Jan-Mar 2016 = 1000 + 1600 = 2600

Non-defective cars sold by C during Jan-Mar 2016 = (4 × 85/100 + 3 × 90/100 + 4 × 92/100) × 100

⇒ 4 × 85 + 3 × 90 + 4 × 92 = 978

Ratio of non-defective cars sold by C to that of all cars sold by A and B during Jan-Mar 2016 = 978 : 2600

⇒ 489 : 1300

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