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Hi everyone, 

 

We have a table so 

  Gold Silver Rose gold
Necklace .1 .19 .11
Earrings .07 .15 .13
Rings .06 .09 .1

 

Find the probabilty the priece of Jewerly is a gold earring or is a silver ring. 

 

Do I have to add only .07 + .09 or 

 

Do i have to add all the earrings columns + the silver colums ? Without double the .15 ? 

 

If anyone could help me with that probleme that would be nice, thank you ! 

Enjoy your evening and your weekend! :) 

God bless you ! 

 
 Nov 14, 2015
 #1
avatar+118723 
+5

We have a table so 

 

  Gold Silver Rose gold Total prob
Necklace .1 .19 .11 .40
Earrings .07 .15 .13 .35
Rings .06 .09 .1 .25
Totral probability .23 .43 .34 1

 

 

 

 

Find the probabilty the priece of Jewerly is a gold earring or is a silver ring.   0.07+0.09 = 0.16

 

Do I have to add only .07 + .09       YES

 

Do i have to add all the earrings columns + the silver colums ? Without double the .15 ? 

NO then you would get a whole heap of other jewellry as well.

 Nov 15, 2015

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