In order to graduate, a bo needs an average of 65 percent for his five major subjects. His first four grades were 55, 60, 65, and 65. What grade does he need in the fifth subject in order to graduate like a boss?

3 answers

(55+60+65+65+x)/5=65
x=80
so on the fifth subject he needs an eighty.
65 * 5 = 325

55 + 60 + 65 + 65 = 245

325 - 245 = 80

He needs 80% for the last subject.
He needs a total of 5*65 = 325 points.
He has(55+60+65+65) = 245
He needs 325-245 = 80

If you want to set this up in equation form it will be
(55+60+65+65+x)/5 = = 65 and solve for x