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A survey was conducted regarding the number of automotive vehicles owned per household. The results of the survey are as follows: \(\begin{array}{c|c} \text{Vehicles}&\text{Households}\\ \hline 0&3\\ 1&9\\ 2&10\\ 3&2\\ 4&1\\ \end{array}\)Express the average number of vehicles per household as a decimal rounded to the nearest tenth.

 Apr 18, 2018
 #1
avatar+101228 
+2

We have  a weighted average here :

 

[ Number of vehicles  ]  / [ Number of households  ]  =

 

[ 3*0   +  9*1 + 10*2  + 2*3  + 1*4  ]  / [ 3 + 9 + 10 + 2 + 1  ]  =

 

[ 0 + 9 + 20 + 6 + 4  ]  / [ 25 ]   =

 

[ 39 ] /  [ 25 ]   =

 

1.56   =  1.6  venicles per household

 

 

cool cool cool

 Apr 18, 2018
 #2
avatar+4259 
+2

Thanks so much, CPhill! smileysmiley

tertre  Apr 18, 2018

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