Question

in the first four papers each of loo marks rishi got 95 , 72,73,and 83 marksif he wants an average of greater than or equal to 75 marks and less than 80 marks .then the range of marks he should score in the fifth paper is

Answer 1

If marks of each subject obtained =75
then sum of all marks scored in all five marks=75*5=375

If obtained marks in each subject =80
then sum of all marks scored in all five marks=80*5=400

sum of his marks in four test =95+73+72 +83

=323

range of marks =P-px
P=400-323
=77
px=375-323
=52

range of marks =52-76