Teaching BPSC बिहार मध्य विद्यालय (6 to 8) शिक्षक भर्ती 4.0 Mock Test Quantitative Aptitude Time and Work Work Efficiency
A, B and C can do a certain work in 10 days, 12 days and 15 days respectively. B and C start working together and work for four days after which both left the job and the remaining work is completed by A. Find the time taken for completing the job.
1
10 days
2
8 days
3
12 days
4
More than one of the above
5
None of the above