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NCERT Class XI Mathematics - Probability - Solutions

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Question : 32 of 54
Marks: +1, -0
If 211\frac{2}{11} is the probability of an event, what is the probability of the event ‘not A’.
Solution:  
Let P(A) = 211\frac{2}{11}
P(not A) = 1 – P(A) = 1 - 211\frac{2}{11} = 911\frac{9}{11}
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