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The probability that at least one of the events `Aa n dB` occurs is 0.6. If `Aa n dB` occur simultaneously with probability 0.2, then find `P( A )+P( B )dot`

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The probability that at least one of the events Aa n dB occurs is 0.6. If Aa n dB occur simultaneously with probability 0.2, then find P( barA )+P( bar B )dot

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