Correct Answer - Option 1 : Rs. 1.6
Given:
CP of 3 oranges = Rs. 5
CP of 5 oranges = Rs. 7
CP of 7 oranges = Rs. 9
Concept:
To do this type sum, equal the number of articles bought.
Calculation:
Taking LCM of the number of oranges bought;
LCM of 3, 5 and 7 = 105
∴ Price of 3 oranges = Rs 7
⇒ Price of 105 oranges = Rs 5 × 35 = Rs. 175
Price of 5 oranges = Rs 7
⇒ Price of 105 oranges = Rs 7 × 21 = Rs. 147
Price of 7 oranges = Rs 9
⇒ Price of 105 oranges = 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 each article = 502.7/315
= Rs. 1.6 Approx