Question

Calculate the average (arithmetic mean) of the list of numbers shown in the table. (rounded to the nearest tenth) A) 35.2 B) 39.0 C)39.1 D) 39.2

Answer 1

The average / mean is 39.1

Explanation:

Numbers Given :- 23 , 33 , 33 , 27 , 25 , 68 , 27 , 44 , 72

What to do ?

• Find the average / mean

Solution :-

What we know is ,

Formula of average :- Sum of observation / No. of observation

• Total no. of observation :- 9

Lets do it , by putting the values we get :-

`(23 + 33 + 33 + 27 + 25 + 68 + 27 + 44 + 72)/(9)`

`= 39.1`

Answer 2

Given Numbers:-

• 23, 33 ,33 ,27 ,25 ,68 ,27 ,44 ,72

To Find:-

• average of this set of numbers

Solution:-

`\green{ \underline { \boxed{ \sf{Average = (Sum \:of \: observation)/(Number \:of \: observation)}}}}`

`\longrightarrow` Here, no of observation are 9

Now,

`\begin{gathered}\implies \small \sf Average =(23+33+33+27+25+68+27+44+72)/(9)\\\end{gathered}`

`\begin{gathered}\\\implies \small \sf Average =(56+60+93+71+72)/(9)\\\end{gathered}`

`\begin{gathered}\\\implies \sf Average =(116+164+72)/(9)\\\end{gathered}`

`\begin{gathered}\\\implies \sf Average =(352)/(9)\\\end{gathered}`

`\begin{gathered}\\\implies \sf Average = 39.1 \\\end{gathered}`

`\longrightarrow`The Average of given set of numbers is 39.1 .

∴ Option C) is correct ✔️