+0  
 
0
279
1
avatar+282 

Help me

 May 22, 2017
 #1
avatar+95884 
+1

 

Probability  that first is black  = [ 12 black pens] / [ 30 Total Pens]  =  12 / 30  =  2/ 5

 

Probability that second is red  =  [  5 red pens ]  /  [ 29 Remaining Pens]  =  5 / 29

 

So.....the total probability  is    ( 2 / 5) * ( 5 / 29)   

 

Swap  denominators   = (2/29) ( 5 / 5 )   = ( 2 / 29 )  * ( 1 )  =

 

2 / 29

 

 

cool cool cool

 May 22, 2017

15 Online Users

avatar
avatar

New Privacy Policy

We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive information about your use of our website.
For more information: our cookie policy and privacy policy.