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Assume that when adults with smartphones are randomly​ selected, 44​% use them in meetings or classes. If 14 adult smartphone users are randomly​ selected, find the probability that fewer than 5 of them use their smartphones in meetings or classes.  The probability is?

 Mar 19, 2020

Best Answer 

 #1
avatar+20802 
+1

The probability is:  14C4 · (0.44)4 · (0.56)10

                          +  14C3 · (0.44)3 · (0.56)11

                          +  14C2 · (0.44)2 · (0.56)12

                          +  14C1 · (0.44)1 · (0.56)13  

                          +  14C0 · (0.44)0 · (0.56)14  

Find this sum ...

 Mar 19, 2020
 #1
avatar+20802 
+1
Best Answer

The probability is:  14C4 · (0.44)4 · (0.56)10

                          +  14C3 · (0.44)3 · (0.56)11

                          +  14C2 · (0.44)2 · (0.56)12

                          +  14C1 · (0.44)1 · (0.56)13  

                          +  14C0 · (0.44)0 · (0.56)14  

Find this sum ...

geno3141 Mar 19, 2020

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