let y1 and y2 denote the proportions of two different types of components in a sample from a mixture of chemicals used as an insecticide. Suppose that y1 and y2 have the joint density function given by
f(y1,y2) = 2, 0<=y1<=1, 0<=y2<1, 0<= y1+y2 <=1 and 0 elsewhere.
Notice that Y1 +y2 <= 1 because the random variables denote proportions withint he same sample.
Find
a.) P(y1<=3/4, y2<=3/4)
b.) P(y1<=1/2, y2<=1/2)