in a bag there are blue discs and white discs. there are eight times as many blue discs as green discs. number of blue discs : number of white discs = 6:5 one disc is selected at random. work out the probability that the disc is either blue or white.

“exterior angles of triangles. an exterior (or external) angle is the angle between one side of a triangle and the extension of an adjacent side. try this drag the orange dots on any vertex to reshape the triangle.” look to get to the answer i explained what it means and other things i hope it you .