A class of 36 students contributed ₹540 each for the picnic. Out of these, 7 students decided not to go. They were returned ₹490 each. What amount was spent on the picnic?

Given:

Total number of students = 36
Contribution per student = ₹540

Total amount collected = 36 x 540 = 19440

Number of students who did not go = 7
Amount returned per student = ₹490

Total amount returned = 7 x 490 = 3430

Amount spent on picnic = Total amount collected - Total amount returned

By substituting the values, we get:

Amount spent on picnic = 19440 - 3430 = 16010

∴ The amount spent on the picnic = ₹16010