At 8.00 am there are 8 persons waiting is a queue outside a ration shop. 4 persons join one minute later. The number of persons joining the queue per minute increases at a rate of two persons per minute. The shop opens at 8 : 20 am and distributes the ration which is available for 300 persons only. How many persons will have to return empty–handed if no person arrived after 8.20 am?
a) 198
b) 328
c) 468
d) 178
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