engineering recuitment OSSC Combined Technical Services (ଓଡିଶା) Mock Test 2023-24 Quantitative Aptitude Time and Work Work Efficiency
A can do a piece of work in 15 days and B in 20 days. If they work on it together for 4 days, then the fraction of the work left is:
1
\(\frac{1}{10}\)
2
\(\frac{8}{15}\)
3
\(\frac{1}{4}\)
4
\(\frac{7}{15}\)