+0  
 
-1
33
1
avatar+2482 

Help 8,9

NotSoSmart  Apr 26, 2018
Sort: 

1+0 Answers

 #1
avatar+86528 
+2

8.   We have 12 pens to choose from and 10 highlighters to  choose from

 

7 of the pens are black    and     8 of the 10 highlighters are  NOT green....so.....

 

P(Black Pen )  = 7/12

P (Not a Green Highlighter)  = 8/10

 

So...P (Balck Pen and not a Green Highlighter) =   (7/12) * (8/10)  =  56/120  =  7/15

 

 

9. The odd primes are :  3,5,7,11,13, 17  =  6 odd primes

 

P ( Even or Odd Prime ) = P(Even)  + P(Odd Prime) - P(Even and Odd Prime)  =

                                           10/20    +  6/20   -  0/20 =

                                             16/20  =

                                               4/5 =

                                                 .8

 

cool cool cool

CPhill  Apr 26, 2018

32 Online Users

avatar
New Privacy Policy (May 2018)
We use cookies to personalise content and ads, to provide social media features and to analyse our traffic. We also share information about your use of our site with our social media, advertising and analytics partners.  Privacy Policy