There are 10 marbles. What is the probability of drawing two yellow marbles if the first one is not placed back into the bag bef
ore the second draw?
1 answer:
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The '68-95-99.7' rule says
-About 68% of values fall within one standard deviation of the mean.
-About 95% of the values fall within two standard deviations from the mean.
-Almost all of the values — about 99.7% — fall within three standard deviations from the mean.
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Therefore, the probability
The required probability