A. 45

B. 50

C. 55

D. 60

### Check Answer

The correct answer is

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:

We know that;

Loss = Cost price – Selling Price

According to the statement, Put values in the above formula

(Cost Price of 5 balls) = (Cost Price of 17 balls) – (Selling Price of 17 balls)

(C.P of 17 balls) – (C.P of 5 balls) = Selling Price of 17 balls

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

According to the above equation, the Selling price of 17 balls is equal to the cost price of 12 balls.

As we know, the selling price of 17 balls is RS. 720, the cost price of 12 balls will also be RS. 720.

C.P of 12 balls = RS. 720

C.P of 1 ball would be = RS. \frac{720}{12}

C.P of 1 ball = RS. 60

**“60”**.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:

**Step by Step Solution:**

We know that;

Loss = Cost price – Selling Price

According to the statement, Put values in the above formula

(Cost Price of 5 balls) = (Cost Price of 17 balls) – (Selling Price of 17 balls)

(C.P of 17 balls) – (C.P of 5 balls) = Selling Price of 17 balls

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

According to the above equation, the Selling price of 17 balls is equal to the cost price of 12 balls.

As we know, the selling price of 17 balls is RS. 720, the cost price of 12 balls will also be RS. 720.

C.P of 12 balls = RS. 720

C.P of 1 ball would be = RS. \frac{720}{12}

C.P of 1 ball = RS. 60

**Hence the cost price of 1 ball is Rs. 60**

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