Station QBE played 40 minutes of uninterrupted music. Of the songs played, 2/3 were performed by female vocalists and 3/5 of these were ballads. What fraction of the uninterrupted music was ballads by female vocalists?
Of 410 consumers polled, some purchases music on CDs, some only download music, and some do both. If 290 people polled purchase CDs, and 220 purchase CDs and download music, how many people download music?