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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

 Apr 14, 2018

Best Answer 

 #1
avatar+17746 
+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.

 Apr 15, 2018
 #1
avatar+17746 
+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

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