On selling 17 balls at Rs. 720, there is a loss equal to the cost price of 5 bal

Question

On selling 17 balls at Rs. 720, there is a loss equal to the cost price of 5 balls. The cost price of a ball is:

Options:

A . Rs. 45

B . Rs. 50

C . Rs. 55

D . Rs. 60

Answer: Option D

(C.P. of 17 balls) - (S.P. of 17 balls) = (C.P. of 5 balls)

C.P. of 12 balls = S.P. of 17 balls = Rs.720.

C.P. of 1 ball = Rs. \(\left(\frac{720}{12}\right)\) = Rs. 60

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