Cost of one pen and chocolate
To find out the cost of one chocolate, we need to have some more information. Without any additional information, we cannot determine the cost of one chocolate.
Ratio of cost of pen and chocolate
Assuming that there is a certain ratio between the cost of one pen and one chocolate, we can find out the cost of one chocolate. Let's say the ratio of the cost of one pen to one chocolate is x:y.
Then we can write:
x:y = cost of one pen : cost of one chocolate
And we know that the cost of one pen is Rs. 10.5, so we can substitute this value:
x:y = 10.5 : cost of one chocolate
Now we need to find out the value of x:y. If we are given this information, we can solve for the cost of one chocolate.
Other factors affecting cost
However, there may be other factors that affect the cost of one chocolate, such as the brand, size, and quality of the chocolate. Without knowing these details, we cannot determine the cost of one chocolate.
Therefore, we need more information to solve this problem. We cannot assume that the cost of one chocolate is directly proportional to the cost of one pen.
Conclusion
In conclusion, we cannot determine the cost of one chocolate without additional information. We need to know the ratio of the cost of one pen to one chocolate or other factors that affect the cost of chocolate such as brand, size, and quality.