A roulette wheel is divided into 25 sectors of equal area numbered from 1 to 25. let X be the number that occurs when
the wheel is span. Find : (i) Probability mass function of X,
(ii).P (X 25), (iii) Mean of X, (iv) Standard deviation of X.​

The construction of copying qpr is started below. the next step is to set the width of the compass to the length of ab. how does this step ensure that a new angle will be congruent to the original angle? by using compass take the measures of angle and draw the same arc according to it.