Question 353124
Michael scored 68, 77, and 98 on three test. He needs to have an average of at least 85. what must he score on the forth test?
.
Let x = score on fourth test
then
(68+77+98+x)/4 >= 85
(243+x)/4 >= 85
243+x >= 340
x >= 97
.
He has to score a 97 or higher.