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# Probability

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An urn contains 8 red chips, 10 green chips, and 2 white chips. A chip is drawn and replaced and then a second chip is drawn. What is the probability of?
a.) A white chip on the first draw
b.) A white chip on the first draw and a red on the second.
c.) Two green chips being drawn.
d.) A red chip on the second draw given a white chip was drawn on the first.

##### Solution Summary

The solution addresses the probability of an urn contains 8 red chips, 10 green chips, and 2 white chips. A chip is drawn and replaced and then a second chip is drawn. What is the probability of?
a.) A white chip on the first draw
b.) A white chip on the first draw and a red on the second.
c.) Two green chips being drawn.
d.) A red chip on the second draw given a white chip was drawn on the first.

##### Solution Preview

a) The total number is N=8+10+2=20. since there are 2 white chips, the probability for a white chip to be drawn is 2 out of 20, i.e., P=2/20=0.1 or 10%
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<br>b) From (a), the probability for a white chip to be drawn is Pw= 0.1.
<br> In the same way, the probability for a red chip to be drawn is 8 out of ...

##### Measures of Central Tendency

This quiz evaluates the students understanding of the measures of central tendency seen in statistics. This quiz is specifically designed to incorporate the measures of central tendency as they relate to psychological research.