What is the probability that he takes bus normally?
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Lando works in Brooklyn and his home is in Newark. He comes to office either by bus or train. If he arrives at office on time or earlier, 90% of the times he comes by train and if he is late, 70% of the times she comes by bus. Lando normally arrives at office on time for 80% of the times. What is the probability that he takes bus normally?
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