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A box contains different colored paper clips. The probability of drawing two red paper clips from the box without replacement is 1/7, and the probability of drawing one red paper clip is 2/5.

 

What is the probability of drawing a second red paper clip, given that the first paper clip is red?

 

  • 2/35
  • 1/6
  • 2/3
  • 5/14
 Feb 7, 2018
 #1
avatar+101360 
+3

We have 

 

(2/5) * (Prob 2nd draw red   )   =  1/7       multiply both sides by  5/2

 

(Prob second draw red   )   =   1/7  * 5/2  

 

(Prob second draw red    )   =   5 / 14

 

 

 

cool cool cool

 Feb 7, 2018

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