Problema Solution
Jeff noted that 140 of the 200 flights to airport A Flying out of airport beparted on time. During the next week 400 flights left airport B for A. If the same ratio holds, how many of those flights would he expect to depart on time?
Answer provided by our tutors
let 'x' be the number of flights expected to depart on time
140 : 200 = x : 400
by solving we find
x = 280 flights
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280 flights out of 400 could be expected to depart on time.