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

At least 16 calls must be made.

Step-by-step 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 at least 20.

Hence, at least 16 calls must be made.