Hai please help me to solve this problem
Some students arranged a picnicthe budget for the food was Rs 240. Because four students of the group failed to go the cost of food to each students got increased by Rs 5 how many students went for the picnic?
Please help me

Let the number of people be N and the cost each be C.

Then, originally, we have NC=240

But, 4 bail out and the cost raises by 5 each. So, we have (N-4)(C+5)=240

Now, you have two equations with two unknowns. Solve for N (and C) and your finished.