Let \( E \) be an event which is neither a certainty nor an impossibility. If probability is suc....

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Let \( E \) be an event which is neither a certainty nor an impossibility. If probability is such that \( P(E)=1+\lambda \)
\( \mathrm{P} \)
\( +\lambda^{2} \) and \( P\left(E^{\prime}\right)=(1+\lambda)^{2} \) in terms of an unknown \( \lambda \). Then \( P(E) \) is equal to
(1) 1
(2) \( \frac{3}{4} \)
(3) \( \frac{1}{4} \)
(4) None of these


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