A and B can do a piece of work in 20 days and 30 days respectively. They work together for 4 days and then leave. What fraction of the total work is left?

Options:

• A: 1/3
• B: 2/3
• C: 1/2
• D: 3/4

Related Practice Questions:

• Why is copper considered highly pure and extensively used in religious rituals by Hindus today according to the historical context of natural resources?
• Which of the following regions is described by R.S. Sharma as "the most coveted and contested area" fought over by important ruling powers in northern India?
• Paper currency was not used in ancient India. In which century was paper currency finally introduced to India?
• The earliest agricultural settlements and states in ancient northern India were founded along the Himalayan foothills (the "terai" route) during which period?