| Directions: Q. 11 to 15 |
| Mr. Jayant sahu arranged dinner party for some of his friends. The expenses of the dinner are partly constant and partly proportional to the number of guests. The expenses amount to Rs 450 for 5 guest and Rs 850 for 10 guests. |
 |
| Denote the constant expense by Rs x and proportional expense per person by Rs y and answer the following questions. |
A) \[x+5y=850,x+10y=450\]
B) \[x-5y=850,x-10y=450\]
C) \[x+5y=450,x+10y=850\]
D) None of the above
Correct Answer: C
Solution :
| For the first case, |
| Cost (proportional) for 5 guests = 5y |
| Total cost = 450 |
| Then, the situation is x + 5y = 450 |
| For the second case, |
| Cost (proportional) for 10 guests = 10y |
| Total cost = 850 |
| Then, the situation is x + 10y = 850 |
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