1.

A man bought3 oranges for Rs. 5, 5 oranges for Rs. 7 and 7 oranges for Rs. 9. Find the approx selling price per article to make a profit of 10%?1. Rs. 1.62. Rs. 2.33. Rs. 2.74. Rs. 1.2

Answer» Correct Answer - Option 1 : Rs. 1.6

Given:

CP of 3 oranges = Rs. 5

CP of 5oranges = Rs. 7

CP of 7oranges = Rs. 9

Concept:

To do this type sum, equal the number of articles bought.

Calculation:

Taking LCMof the number of oranges bought;

LCM of 3, 5and 7= 105

∴ Price of 3 oranges = Rs 7

⇒ Price of 105oranges = Rs 5× 35 = Rs. 175

Price of 5oranges = Rs 7

⇒ Price of 105oranges = Rs 7× 21= Rs. 147

Price of 7oranges = Rs 9

⇒ Price of 105oranges = Rs 9× 15= Rs. 135

∴ Price of 315 oranges = Rs. 175 + Rs. 147+ Rs. 135

= Rs. 457

∴ Selling price with 10% profit = 457 + (10/100)× 457

= 457 + 45.7

= Rs. 502.7

∴ Selling Price of eacharticle = 502.7/315

= Rs. 1.6Approx



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