Andrea is a very good student. the probability that she studied and passed her mathematics test is 17/20. if the probability that andrea studies is 15/16, find the probability that andrea passes her mathematics test, given that she has studied?

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.