The computer airline which have 81 seats having only 90 percent showing up rate must book 90 seats if the airline wants to fill all the seats of the plane.
It is given in the question that on an average only 90 percent of the people who book for a seat in the flight actually show up for it. Hence , in order to fill all the 81 seats of the airline, the airline must book the number of seats whose 90 percent is 81 seats.
Let the number of seats the airplane must book in order to fill all the 81 seats of the airline be n.
Hence,
[tex]\frac{90}{100}*n=81\\ \\n=\frac{100}{90}*81\\ \\n=90 seats[/tex]
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