The endpoints of ef are e(xe , ye) and f(xf , yf). what are the coordinates of the midpoint of ef? (xf2,yf2) (xe2,ye2) (xe+xf2,ye+yf2) (xe+xf2,ye+yf2)

White shapes and black shapes are used in a game. some of the shapes are circles. while the rest are squares. the ratio of the number of white shapes to the number of black shapes is 5: 11. the ratio of the number of white cicrles to the number of white squares is 3: 7. the ratio of the number of black circles to the number of black squres is 3: 8. work out what fraction of all the shapes are circles.