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Question

For any two independent events E1 and E2,P{(E1E2)(¯¯¯¯¯¯E1)(¯¯¯¯¯¯E2)} is

A
<14
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B
>14
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C
12
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D
None of these
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Solution

The correct option is A <14
Since ¯¯¯¯¯¯E1¯¯¯¯¯¯E2=¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯E1E2 and (E1E2)(¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯E1E2)=ϕ
P[(E1E2)(¯¯¯¯¯¯E1¯¯¯¯¯¯E2)]=P(ϕ)=0<14

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