The average of a student in 4 subjects is 75 if the tudents obtained 80 marks in the 5th subject,then new average is
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75 = (x1+x2+x3+x4)/4
75*4= (x1+x2+x3+x4)
300 = (x1+x2+x3+x4)
if one other(80) is added, then
average = (300+80)/5
average = 380/5
average = 76
then new average is 76 marks
75*4= (x1+x2+x3+x4)
300 = (x1+x2+x3+x4)
if one other(80) is added, then
average = (300+80)/5
average = 380/5
average = 76
then new average is 76 marks
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