MCA Entrance Previous Year Question Bank

Computer $A$ takes 3 min to process an input while computer $B$ takes 5 min. If computers $A,B$ and $C$ can process an average of 14 inputs in one h, how many minutes does computer $C$ alone take to process one input?

A child can do a piece of work 15 hours slower than a woman. The child works for 18 hours on the job and then the woman takes charge for 6 hours. In this manner, 3/5 of the work can be completed. To complete the job now, how much time will the woman take?

It has been reported in recent years that a very large number of seats in the engineering colleges in the country remain vacant at the end of the admission session. Which of the following may be the probable cause of the above effect?

A can do a piece of work in 10 days and B can do a work in 20 days after 4 days B left and C joins then A and C to work together in 2 days. In how many days C alone do the work