The marks scored by 30 students in a Mathematics test are recorded in the table below:

In the figure above, |CD| is the base of the triangle CDE. Find the area of the figure to the nearest whole number.

If $4{{\sin }^{2}}x-3=0$ find the value of x when $0{}^\circ \le x\le 90{}^\circ $

From the cyclic quadrilateral MNOP above, find the value of x

The locus of a point which moves so that it is equidistant from two intersecting straight lines is the

Use the table below to answer question 14 and 15

Find the variance

Find the mean of the data

Given the matrix $M=\left( \begin{matrix}   -2 & 0 & 4  \\   0 & 1 & -6  \\   5 & 6 & 3  \\\end{matrix} \right),$ find ${{M}^{T}}+2M$

In how many ways can the word MATHEMATICIAN be arranged