Question

some students 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 he picnic.

Answer 1

20 STUDENTS ATTENDED THE PICNIC

Answer 2

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By direction options,  

500/25 = 20, 500/20 = 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