On his first 4 MGMT 3100 HWs, Drroopy received the following scores: 7

On his first 4 MGMT 3100 HWs, Drroopy received the following scores: 75, 68, 92 and 77. What test score must he earn on his fifth HW so that his average (mean score) for all five tests will be 80?

On his first 4 MGMT 3100 HWs, Drroopy received the following scores: 7

On his first 4 MGMT 3100 HWs, Drroopy received the following scores: 75, 68, 92 and 77. What test score must he earn on his fifth HW so that his average (mean score) for all five tests will be 80?