Hi Let x be score on next exam (99 + 86 + 76 + 95 + x)/5 = 91 99 + 86 + 76 + 95 + x = 455 x = 455 - 356 = 99, score needed on next exam Wish You the Best in your Studies.
= 91 99 + 86 + 76 + 95 + x = 5*91 x = 5*91 - (99 + 86 + 76 + 95) = 99. ANSWER
1st test: 99 = + 8 2nd test: 86 = - 5 3rd test: 76 = -15 4th test: 95 = + 4 ------------------- total: - 8