Find. (i × j).k + (k × j).i - (i × k).j. where i,j,k are vectors.
A bag consists of 5 black marbles and some white marbles. The probability of selecting 2 white
marbles from that is 2/9. find number of white marbles.
Show that if the diagonals
of a quadrilateral bisect each other at right angles then it is a rhombus
An Ap consists of 21 terms.the sum of three terms in the middle is 129 and the last three terms is 237.find the A.P