document.write( "Question 862955: Airlines usually over-book the seats on an aircraft by a certain margin because they know from experience that some people change or do not show for their scheduled flight. Data collected for a particular Melbourne–Darwin flight showed that, on average, 183 people (with a standard deviation of 31) did arrive for their scheduled flight. The data followed a normal distribution. The aircraft has seats for 344 passengers.
\n" ); document.write( "a) A particular flight goes every day. During one year of operation, how many times would you expect there to be more passengers than available seats?
\n" ); document.write( "b) The cost of each flight to the airline is $71000. The cost of a ticket is $460. On what proportion of flights does the airline lose money.
\n" ); document.write( "c) In a period of 12 days, what is the probability the airline loses money?
\n" ); document.write( "I have tried that the first question ,but my answer is 1, I am so confusing about that and also the following questions .THX a lot.
\n" ); document.write( "

Algebra.Com's Answer #520106 by ewatrrr(24785)\"\" \"About 
You can put this solution on YOUR website!

\n" ); document.write( "Hi
\n" ); document.write( "a)with z = (344-183)/31 = 5.1935....
\n" ); document.write( "how many times would you expect there to be more passengers than available seats? never
\n" ); document.write( "b) $71000/$460 = 154
\n" ); document.write( "z = (154-183)/31 = - .9243
\n" ); document.write( "P(z<-.9245) = 17.77% of the time
\n" ); document.write( "c) .1777*12 = 2.1324 Approximately 2 days
\n" ); document.write( "my thoughts...
\n" ); document.write( "Wish You the Best in your Studies. \n" ); document.write( "
\n" );