If $straight P left parenthesis straight A right parenthesis space equals space 1 half comma space space space straight P left parenthesis straight B right parenthesis space equals space 0 comma space space then space straight P left parenthesis straight A space left enclose straight B right parenthesis$ is

0

$1 half$

not defined

1

Solution

not defined

$straight P left parenthesis straight A right parenthesis space equals space 1 half comma space space straight P left parenthesis straight B right parenthesis space equals space 0 therefore space space space space space straight P left parenthesis straight A space left enclose straight B right parenthesis end enclose space equals space fraction numerator straight P left parenthesis straight A intersection straight B right parenthesis over denominator straight P left parenthesis straight B right parenthesis end fraction comma space which space is space not space defined space as space straight P left parenthesis straight B right parenthesis space equals space 0$
∴ (C) is correct answer.

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