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On time x % Up to 15 minutes delay...

On time `x` % Up to 15 minutes delayed 43%, 15-30 minutes delayed 17% , 30-60 minutes delayed 12% , More than 60 minutes delayed 3% , The chart above describes departures from a certain airport on a certain day. If 1200 flights were delayed, how many flights departed on time? `250` b. `350` c. `300` d. 400

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