Let E be an event which is neither a certainty nor an impossibility. If probability is such that P(E)=1+λ+λ2 and P(E′)=(1+λ)2 in terms of an unknown λ, then P(E) is equal to
A
1
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B
3/4
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C
1/4
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D
none of these
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Solution
The correct option is B3/4
Let E be an event which is neither certainty nor an impossibility.