In an eating competition, Mr. Bhima has to eat 10 different sweets (one at a time) named A to J. In how many different ways can he eat all the sweets, such that he has to eat A before B and B before C?

10!

5,040

1,000

604,800

None of these

Q14 Ten workers started a job and worked on it for 10 days. Eleventh day onwards, a new worker joined them every day till the job was finished. It took exactly 20 days to finish the entire job. The same job has to be done starting with the minimum possible number of workers when it is known that a worker will quit the job every day after the first day. How many days will it take to finish the job in such a manner