A.  Rs. 45

B.  Rs. 50

C.  Rs. 55

D.  Rs. 60

1
Correct Answer :
Rs. 60
Explanation :

(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. (720 / 12) = Rs. 60


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