SOLUTION: Certain number of students planed to go for a picnic. Tht total expense was estimated to be Rs.3600-. But 15 students could not go. Each student participated had to pay Rs.8/- more

Question 196173: Certain number of students planed to go for a picnic. Tht total expense was estimated to be Rs.3600-. But 15 students could not go. Each student participated had to pay Rs.8/- more. Then howmany students participated in the picnic
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = the number of students who
participated in the picnic.
The expense of 3600 was based on
students participating
The cost per student would have been
But now the cost per student is
The difference between these costs is

Multiply both sides by

Complete the square:

Take the square root of both sides

75 students participated in the picnic
check answer:

OK
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