Let $A$ and $B$ be two events such that $P\,(A) = 0.3$ and $P\,(A \cup B) = 0.8$. If $A$ and $B$ are independent events, then $P(B) = $
Let $A$ and $B$ be two events such that $P\,(A) = 0.3$ and $P\,(A \cup B) = 0.8$. If $A$ and $B$ are independent events, then $P(B) = $
- [IIT 1990]
- A
$\frac{5}{6}$
- B
$\frac{5}{7}$
- C
$\frac{3}{5}$
- D
$\frac{2}{5}$
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