A. Rs.50

B. Rs.60

**C. Rs.80**

D. Rs.90

Explanation:

Let C.P. of clock be Rs. x.

Then, C.P. of 90 clocks = Rs. 90x.

[(110% of 40x) + (120% of 50x)] – (115% of 90x) = 40

44x + 60x – 103.5x = 40

0.5x = 40 => x = 80

### Related Mcqs:

- A manufacturer sells a pair of glasses to a wholesale dealer at a profit of 18%. The wholesaler sells the same to retailer at a profit of 20%. The retailer in turn sells them to a customer for Rs. 30.09, there by earning a profit of 25%. The cost price for the manufacturer is:________?
A. Rs. 15

B. Rs. 16

**C. Rs. 17**

D. Rs. 18 - A man buys an article and sells it at a profit of 20%. If he had bought it at 20% less and sold it for Rs.75 less, he could have gained 25%. What is the cost price?
A. Rs.370

**B. Rs.375**

C. Rs.350

D. Rs.300 - A sells a bicycle to B at a profit of 20%. B sells it to C at a profit of 25%. If C pays Rs. 225 for it, the cost price of the bicycle for A is:________?
A. Rs. 110

B. Rs. 120

C. Rs. 125

**D. Rs. 150** - A person bought an article and sold it at a loss of 10%. If he had bought it for 20% less and sold it for Rs.75 less, he could have gained 25%. What is the cost price?
**A. Rs.250**

B. Rs.225

C. Rs.275

D. Rs.200 - Aleem buys 4 horses and 9 cows for Rs. 13,400. If he sells the horses at 10% profit and the cows at 20% profit, then he earns a total profit of Rs. 1880. The cost of a horse is:_________?
A. Rs. 1000

**B. Rs. 2000**

C. Rs. 2500

D. Rs. 3000 - If an article is sold at 19% profit instead of 12% profit, then the profit would be Rs. 105 more. What is the cost price?
A. Rs. 1505

B. Rs. 1510

**C. Rs. 1500**

D. Rs. 1490

E. None of these - I bought two books; for Rs.480. I sold one at a loss of 15% and other at a gain of 19% and then I found each book was sold at the same price. Find the cost of the book sold at a loss?
A. Rs.28

**B. Rs.280**

C. Rs.140

D. Rs.70 - After allowing a discount of 15% on the marked price, the selling price is Rs. 6800 for an article. If it was sold at marked price, there would have been a profit of 60%. The cost price of the article is?
A. Rs. 6400

B. Rs. 5600

**C. Rs. 5000**

D. Rs. 4800

E. None of these - A man sells a horse for Rs.800 and loses something, if he had sold it for Rs.980, his gain would have been double the former loss. Find the cost price of the horse?
A. Rs.900

B. Rs.875

C. Rs.850

**D. Rs.860** - An article was sold after a discount of 20% and there was a gain of 20%. If the profit made on it was Rs. 6 less than the discount offered on it, find its selling price?
**A. Rs. 72**

B. Rs. 90

C. Rs. 66

D. Rs. 96

E. None of these

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