# Shatabdi Express has a capacity of 500 seats of which 10% are in the Executive class and the rest are chairs. During one journey, the train was booked to 85% of its capacity. If executive class was booked to 96% of its capacity, then how many chairs were empty during that journey?

$Total\;seats=500\\*executive\;class\;seats=500\times \frac{10}{100}=50\\* total\;chair\;seats=500-450=50\\*total\;seats\;booked=500\times \frac{85}{100}=425\\*Executive\;class\;seats\;booked=50\times \frac{96}{100}=48\\* empty\;executive\;class\;seats=50-48=2\\*chair\;seats\;booked=425-2=423\\*empty\;chair\;seats=450-423=27\\* Hence,\;27\;chairs\;were\;empty\;during\;that\;journey.$

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