+0  
 
0
42
2
avatar+269 

I need explanations! Thanks in advance 

LaughingFace  Apr 25, 2018
Sort: 

2+0 Answers

 #1
avatar+92452 
0

Please post your question one at a time.

and please type your worded question in so that they can be copied into the answer easily. 

Melody  Apr 25, 2018
 #2
avatar+86568 
+2

93.

 

P ( Having a pet  l Having a sibling)  = 

 

15 students have a sibling...of these 7 have a pet

 

So....the probability is just 7/15 ≈ 46.7%

 

94.

Note.......P(A or B)  = P(A) + P(B) - P(A and B)

 

P(ace  or 2)  = P(ace) + P(2)  - P(ace and 2)   =

                         4/52  +  4/52  -  1/52  =

                                     7 / 52

 

95.  P (5 or diamond)  = P(5) + P(diamond)  - P(5 and diamond) =

                                        4/52  +  13/52    -         1/52   =

                                              16/52  =

                                               4/13

 

96.   We have 26 black cards....2 of them are queens....so  2/26  = 1/13

 

97. We have 4 kings....only one is a diamond....so  1/4

 

98. Don't know the answer to this one, LF   ...sorry  !!!

 

 

cool cool cool

CPhill  Apr 26, 2018

32 Online Users

avatar
avatar
avatar
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