For two independent events A and B $P( A \cap B ) = \large\frac{3}{25}\: P(A' \cap B) = \large\frac{8}{25}$ then $P(B) =$

Question

$\begin {array} {1 1} (1)\;\large\frac{3}{11} & \quad (2)\;\large\frac{7}{25} \\ (3)\;\large\frac{11}{25} & \quad (4)\;None\: of \: these \end {array}$