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:
A jar contains b black, r red and w white marbles. If a [#permalink]
07 Jun 2007, 09:48
0% (00:00) correct
0% (00:00) wrong based on 0 sessions
A jar contains b black, r red and w white marbles. If a marble is selected randomly from the jar, is the probability that it is a red marble greater than the probability that it is a white marble?
(1) r/(b+w) > w/(b+r)