Question

Joes electric made 19 customer calls last week and 25 this week. How many calls must be made next week in order to maintain an average of at least 20 calls per week for three week period

Answer 1

At least 16 calls must be made.

Explanation:

It is given that Joes electric made 19 customer calls last week and 25 this week.

Let x calls be made next week in a order to maintain an average of at least 20 calls per week for three week period.

`Average=\frac{\text{Sum of observations}}{\text{Number of observations}}`

`Average=(19+25+x)/(3)`

`Average=(44+x)/(3)`

Average at least 20.

`Average\geq 20`

`(44+x)/(3)\geq 20`

`44+x\geq 60`

`x\geq 60-44`

`x\geq 16`

Hence, at least 16 calls must be made.