chunjuwu wrote:

Thank you DJ,

But I wonder know why is not B?

In fact, what's the difference between B and C?

if no (B), an applicant can accpet both two jobs or no job, the conclusion will not be drawn? right?

I understand that is a bit confusing. Choice B says, all of the applicants got the job, but this can't be proved unless Choice C is False. If there is an overlap (1 applicant got job at both), then B would be wrong.

100 applicants were interviewed...

B: 50 got the job at Avco, 50 at Radeco.

But, if the probability of choosing candidate 2 reaches 200% (selected by both), probability of candidate 2 reaches ZERO. Thus, we can't assure B unless C is correct. And that (read C) would be the base assumption.

Sum up: if we assume C, B would become a fact (not an assumption). C would lead to B.

I hope, I didn't digress from the point