Discussion

Explanation:

Let CP be Rs. x. 

Then, (119 - x)/x × 100 = x

⇒ x² = 11900 - 100x

⇒ x² + 100x - 11900 = 0

⇒ x = $\frac{-100\pm \sqrt{{100}^2+4\times 11900}}{2}$ = $\frac{-100+240}{2}$ = Rs. 70

(-ve value has no meaning, hence discarded)

Hence, option (c).

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