Fill in the blanks:
For any two sets A and B, `(A uuB)`=__________

For any two sets A and B, A - (A - B) equals :

Fill in the blanks: Two angles forming a linear pair are _______________.

Fill in the blanks: Probability of two approaches namely _______ probability and _______ probability.

Fill in the blank a (b-x) + b ( c -a) + c (a -b) = _____________

Fill in the blanks: If A and B are two matrices then A + B is defined only if these are of the ……… order.

Fill in the blanks: If A is a symmetric matrix of order n and B is any square matrix of the same order then B'AB is a ……….. Matrix.

Fill in the Blanks: Area of triangle is _________ the product of any of its sides and corresponding altitude.

Fill in the blanks: Two _____ cannot cross each other.