A store generates Monday through Thursday sales of $150, $125, $75, and $180. What sales on Friday would give a weekday average of $155?

Answer 1

average per day = sum divided by the number of days

(150+125+75 +180+ x)/5 = 155

150 +125+75 +180 + x= 5(155) = 775

530+x=775

x =775-530 = 245 sales for Friday would give an average of 155 for the week