Aptitude - Profit and Loss - Discussion

Discussion Forum : Profit and Loss - General Questions (Q.No. 11)
11.
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:
Rs. 45
Rs. 50
Rs. 55
Rs. 60
Answer: Option
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 = Rs. 60.
12

Discussion:
91 comments Page 9 of 10.

Kanchan said:   9 years ago
Nice explanations. Thank you all.

Mahnoor said:   10 years ago
@Sunny.

We will subtract the balls 17-5 = 12.

Hope you got it.

Avijit said:   10 years ago
Let C.P is x then.

According to question condition of loss.

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

=> (17*x) - 720 = (5*x).

=> 17x - 5x =720.

=> 12x = 720.

x = 720/12.

=> x = 60.

Sikandar said:   10 years ago
17 C.P-17 S.P = 5 C.P.

12 C.P = 17 C.P > 17 C.P = 720.

12 C.P = 720.

C.P = 60.

Ankit Ardeshana said:   10 years ago
Loss for 17 balls = cp of 5 balls.

=> cp of 17 balls - sp of 17 balls = cp of 5 balls.

=> (cp of 17 balls - cp of 5 balls) = sp of 17 balls.

But sp of 17 balls = 720.

=>cp of 12 balls = 720.

=>cp of 1 ball = 720/12 = 60.

Sunny said:   1 decade ago
How C.P. of 12 balls?

Baskar said:   1 decade ago
Loss = C.P-S.P.

From given: S.P of 17 balls = 720 R.S.

Loss = C.P of 5 balls.

From 1st equation.

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

Let C.P of 1 ball = x.

5x = 17x-720.
12x = 720.
x = 60.

Reja said:   1 decade ago
Any one may explain in a simple form?

Ramesh Yadav said:   1 decade ago
@Tina.

Observing this question you find that he say.

Selling of 17 balls Rs. 720 is equal to the loss of cost prize of 5 balls. Then we find that.

Let us suppose C.P. is x.

Then C.P. of 17 balls - S.P. of 17 balls = C.P. of 5 ball.

17x-720 = 5x.

Then 12x = 720.

x = 720/12.
x = 60.

Tina said:   1 decade ago
In the question, it is given the that on selling 17 balls at rs 720, the loss is equal to cost prize of 5 balls, but why have we subtracted it from cost prize of 17 balls when it is no where mentioned in the question ?


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