Question

If p(A) - p(A') = 0.2 , find p(A) = ?
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Answer 1

$\bf\huge\underline{\underline{ Given :- }}$

• p(A) - p(A') = 0.2

$\bf\huge\underline{\underline{ To \: Find:- }}$

• p(A)

$\bf\huge\underline{\underline{ Answer :- }}$

• p(A') = 1 - p(A) ----(1)

substitute (1)

• p(A) - (1 - p(A) ) = 0.2

• p(A) + p(A) - 1 = 0.2

• 2 × p(A) = 0.2 + 1

• p(A) = $\bf \frac{1.2}{2}$

$\rule{10cm}{0.05cm}$