Question

Question #7e646

Answer 1

`68`

Explanation:

`"to find the average of any 2 numbers, a and b"`

`"average " =(a+b)/2`

`"thus for 36 and 100"`

`"average "=(36+100)/2=126/2=68`

`color(blue)"In general"`

`"for any group of numbers, say n numbers, then"`

`"average "=(sum(n))/n`

`"where " sum " represents 'the sum of'"`

`"for 3 , 4 , 5"`

`"average " =(3+4+5)/3=12/3=4`

Answer 2

Mean value is 68

Explanation:

This is one that is definitely worth remembering:

Assumption: by average you are referring to the mean value.

There are in fact 3 types of average:

1. Mean
2. Median
3. Mode
   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   `color(blue)("Determine the mean value")`

A mean value is that single number, which when multiplied by the count of all the numbers in the given group, has the same answer as the sum of all the numbers.

In general it is: `("sum of all the numbers")/("count of the numbers")`

In this case we only have two numbers so the mean is:

`("first number + last number")/("count of numbers")->(36+100)/2=68`

Mean value is 68

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
`color(blue)("Note that:")`

`"count of numbers "xx" mean value "->2xx68=136`

`"sum of all the numbers "->36+100=136`