For the following questions answer them individually
If p, q are any two statements, the negation of the statement $$((\sim p \vee q) \wedge (p \vee \sim q)) \vee (p \wedge q)$$ is
Let A, B be subsets of a set X and let n(A) denote the number of elements in A. If $$n(A) = 15, n(A \cap B) = 4, n(A \cup B) = 21$$ then n(B - A) =
A line l which makes equal intercepts with the coordinate axes, passes through the point $$(3, - 4)$$. Then it also passes through the point:
If A(2, -3), B(3, 4) and C(-1, 5) are vertices of a triangle, then the length of median through A is:
If $$\sin \theta = \frac{5}{13}$$ and $$\theta$$ is not in the first quadrant, then $$\sec \theta + \tan \theta =$$