In a computer lab, there are 5 computers for every 10 students. How many computers will be needed for 48 students?

Q. In a computer lab, there are 5 computers for every 10 students. How many computers will be needed for 48 students?

Q. The number of hours needed to assemble computers varies directly as the number of computers and inversely as the number of workers. If $4$ workers can assemble $12$ computers in $9$ hours, how many workers are needed to assemble $48$ computers in $8$ hours?

Q. An electronic store has $684$ new computers and $296$ used computers. How many computers are there in total?

Q. Statement: Should 'computer knowledge' be made a compulsory subject for all the students at secondary school level?
Arguments:
I. No, our need is 'bread' for everyone, we cannot follow western models.
II. Yes. We cannot compete in the international market without equipping our children with computers.