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. $$\frac{5}{9}$$

B. $$\frac{2}{9}$$

C. $$\frac{1}{9}$$

D. $$\frac{4}{9}$$

Answer: Option D

Solution (By Examveda Team)

(Smith + Ajit) × 4 = 4 × 5 = 20
Remaining work = 36 - 20 = 16
Then the fraction of the task that will be left is $$ = \frac{{16}}{{36}} = \frac{4}{9}$$