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There are only six red, four blue and eight brown buttons in a jar. A button is randomly selected from the jar. What is the probability that the button selected is not blue? 

 May 18, 2020
 #1
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There are 6+4+8 buttons = 18, 4 are blue, thus the probability of getting a blue is 4/18  = 2/9. If we don't want a blue, 1 - 2/9 = 7/9 which is our probability.

 

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 May 18, 2020
 #2
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14 out of 18 are   not blue       14/18 = 7/9

 May 18, 2020

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