According to the general equation for conditional probability if p(anb)=3/7 and p(b)=7/8 what is p(a i b)

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles

Mrs. morton has a special reward system for her class. when all her students behave well, she rewards them by putting 3 marbles into a marble jar. when the jar has 100 or more marbles, the students have a party. right now, the the jar has 24 marbles. how could mrs. morton reward the class in order for the students to have a party?

With finding limits of multi variable !