+0  
 
+1
32
1
avatar+627 

If the probability that a baby born in a certain hospital will speak in the next day is 1/4, what is the probability that at least 2 babies out of a cluster of 5 babies will speak tomorrow? 

Thanks!!!!

smileysmileysmiley

 
MIRB16  Apr 14, 2018

Best Answer 

 #1
avatar+17721 
+2

The probability that 2 babies will speak tomorrow is C(5,2) · (1/4)2 · (3/4)3

                                3                                                C(5,3) · (1/4)3 · (3/4)2

                                4                                                C(5,4) · (1/4)4 · (3/4)1

                                5                                                C(5,5) · (1/4)5 · (3/4)0

 

Find the answer to each of the above and add them together.

 
geno3141  Apr 15, 2018
Sort: 

1+0 Answers

 #1
avatar+17721 
+2
Best Answer

The probability that 2 babies will speak tomorrow is C(5,2) · (1/4)2 · (3/4)3

                                3                                                C(5,3) · (1/4)3 · (3/4)2

                                4                                                C(5,4) · (1/4)4 · (3/4)1

                                5                                                C(5,5) · (1/4)5 · (3/4)0

 

Find the answer to each of the above and add them together.

 
geno3141  Apr 15, 2018

28 Online Users

avatar
avatar
avatar
avatar
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.  See details