If Musa scored 75 in biology instead of 57, his average mark in four subjects would have been 60. What was his total mark?

Graceid

5 years ago

y/4=60
y=4×57=228
so 75 - 57= 18
so 228 - 18 = 210

octave

9 years ago

Y/4=75

:y=75*4=300

:75-57=18

Recall total mark @75 in biology =300

:300-18=282

Total mark @ 57 in biology =282