Two fifths of the instruments in the marching band are brass, one third are percussion and the rest are woordwinds. two fifths of the brass instruments are tubas, if there are 240 instruments in the band, how many are tubas?

Several paint mixtures are made by mixing blue paint and white paint. paint colors blue paint white paint mixture a 5 cups 12 cups mixture b 6 cups 6 cups mixture c 4 cups 12 cups mixture d 5 cups 6 cups which mixture has the highest ratio of blue paint to white paint