Question

Some student planned a picnic. The budget for food was Rs. 500. But 5 of these

failed to go and then cost of food for each member is increased by Rs 5. How many

students attended the picnic.....​

Answer 1

Answer:

20 is the answer, alright

Answer 2

20

Step-by-step explanation:

By direction options,

25

500

=20,

20

500

=25

By mathematical method, the main steps are :

xy=500 ...(i)

and (x−5)(y+5)=500

⇒x−y=5 or y=x−5

Puting in equation (i)

x(x−5)=500

⇒x

2

−5x−500=0

⇒x=25

and attended =x−5=20