Selena C.
asked • 10/30/19There are 10 red, 5 blue and 3 green shirts in a drawer. A shirt is selected and returned to the drawer and then the second shirt is selected. What is the probability that the shirts are of different color?
Write your answer as a fraction,in the form a/b, for example 3/7. PLEASE reduce your fraction.
William W. answered • 10/31/19
Math and science made easy - learn from a retired engineer
A Tree Diagram is a nice way to figure this out:
The only ones that have the same color are RR, BB, and GG and their probabilities are 100/324, 25/324, and 9/324 which adds to 134/324. The rest then is 324/324 - 134/324 = 190/324 which can be reduced to 95/162
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