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     EduGorilla 
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    Two trains P and Q are scheduled to reach New Delhi railway station at 10.00 AM. The probability that train P and train Q will be late is 7/9 and 11/27 respectively. The probability that train Q will be late, given that train P is late, is 8/9. Then the probability that neither train will be late on a particular day is

    Options :-

    1. 40/81
    2. 41/81
    3. 77/81
    4. 77/243
    5. 31/243
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