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a box contains 13 red blocks, 8 orange blocks,9 green blocks,and 10 blue blocks . Shelly randomly chooses a block from the box. 
What is the probability that the block will not be green ? write answer as decimal

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Kate200468id
[tex]13\ red+8\ orange+9\ green+10\ blue=40\ all\ blocks\\\\"green"=9\ \ \ \Rightarrow\ \ \ "Not\ green"=31\\\\ \Rightarrow\ \ \ probability:\ \ \ P("Not\ green")= \frac{31}{40} =0.775[/tex]
Before we find the total number of blocks 13+8+9+10=40 blocks

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chance of having the green block   13+8+10/40 

31/40=0.775 present as  Take it easy

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