Smith and Ajit can complete a task in 12 days and 18 days respectively. If they work together on the task for 4 days, then the fraction of the task that will be left is:
A.2/9
B.5/9
C.4/9✓ Correct
D.1/9
Explanation
Combined rate = 1/12 + 1/18 = 5/36 per day. Work done in 4 days = 20/36 = 5/9. Fraction left = 1 – 5/9 = 4/9.
💡 Practice unlimited SSC CHSL PYQs + AI-tracked progress on each topic. Sign up free →