Gate Exam

If A and B are two independent events such that and P(A'∩B)=2/7 and P(A∩B')=1/5, then P(A) is

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Gate Other Question

Let α, β and γ be the cube roots of p (p < 0). For any real numbers x, y and z, the value of (xα+yβ+zγ) ⁄(xβ+yγ+zα) is The number of real negative terms in the binomial expansion of (1+ix)^(4n-2), n € N and x > 0 is?