The table above is a summery of prices for round-trip airplane tickets offered by eight airlines between New York City and San Francisco. What fraction of the non stop flights are under $400?

Airlines C and F offer six nonstop flights each to San Francisco throughout the day at the prices shown in the table. Each flights on each airline can hold 170 passengers. If all six of Airlines C's flights are filled to capacity and all six of Airline E's flights are filled to 90% capacity on a paritcular day, how many more revenue does Airline E generate than Airline C on that day?

Fair-Asia is well known for its queer marketing practices. To lure its customers, out of the blue, it comes up with a very lucrative offer: In that offer it promises to sell and the air tickets, for a one-way trip to Bangkok that originates from Jakrata, in such a manner that the nth customer has to pay exactly Rs.n to buy an air ticket,but each prospective passenger has to bay a separate ticket for oneself. The airline claims that it had sold out all the seats at throm away prices in no time. However, at the last moment one of the customers had returned her ticket and got the full refund from the airline. Consequently, the average income of the airline from this particular flight is exactly rs 100 per passenger. What's the loss incurred by the airline due to the refund of a ticket?

Fair-Asia is well known for its queer marketing practices. To lure its customers, out of the blue, it comes up with a very lucrative offer: In that offer it promises to sell and the air tickets, for a one-way trip to Bangkok that originates from Jakrata, in such a manner that the nth customer has to pay exactly Rs.n to buy an air ticket,but each prospective passenger has to bay a separate ticket for oneself. The airline claims that it had sold out all the seats at throm away prices in no time. However, at the last moment one of the customers had returned her ticket and got the full refund from the airline. Consequently, the average income of the airline from this particular flight is exactly rs 100 per passenger. What could be the customer numbe, who returned her ticket to airline?

Fair-Asia is well known for its queer marketing practices. To lure its customers, out of the blue, it comes up with a very lucrative offer: In that offer it promises to sell and the air tickets, for a one-way trip to Bangkok that originates from Jakrata, in such a manner that the nth customer has to pay exactly Rs.n to buy an air ticket,but each prospective passenger has to bay a separate ticket for oneself. The airline claims that it had sold out all the seats at throm away prices in no time. However, at the last moment one of the customers had returned her ticket and got the full refund from the airline. Consequently, the average income of the airline from this particular flight is exactly rs 100 per passenger. What could be the maximum number of passengers allowed to travel in this airline, if only one passenger occupies each seat and cabin crew or anyone else does not occupy any seat intended for the passengers?