Question 122865
(72+80+65+78+60)/5
355/5=71 AVERAGE FOR THE FIRST 5 TEST RESULTS.
71*2/3+1/3X=76 CALCULATING 2/3 OF THE FIRST 5 TESTS + 1/3 OF THE FINAL TEST SCORE.
142/3+X/3=76
47.33+X/3=76
X/3=76-47.33
X/3=28.67
X=3*28.67
X=86 IS THE REQUIRED TEST SCORE ON THE FINAL TEST TO AVERAGE 76.