Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:
Re: PS: Probability-2 [#permalink]
28 Jun 2008, 10:19
Why not (43/100)*(42/99)?
that would've work if the population of the US consisted of 100 people. The assumption here is that the population is large enough and taking one person out will not change probabilities (independence of events).