400 guavas were bought at Rs. 1240 per hundred and were sold at a profit of Rs. 940. Find the selling price (in Rs. ) per dozen of guavas.

Correct option is C

Given:
Cost Price of 100 guavas is Rs. 1240.
Total number of guavas is 400.
Profit made is Rs. 940.
Formula Used:
​$$\text{Total Cost Price} = \text{Cost Price per 100 guavas} \times \left(\frac{\text{Total number of guavas}}{100}\right)$$​​
Selling Price = Total Cost Price + Profit
​$$\text{Selling Price per Dozen} = \frac{\text{Total Selling Price}}{\frac{\text{Total number of guavas}}{12}}$$​​
Solution:
Total Cost Price of 4800 guavas = $$1240 \times \left(\frac{400}{100}\right) = 1240 \times 4 = 4960$$​​
Total Selling Price of 4800 guavas = 4960 + 940 = 5900
Selling Price of 1 guava = $$\frac{5900}{400}$$​

Selling Price per Dozen = $$\frac{5900}{400} \times 12 = 177$$​​
The selling price per dozen of guavas is Rs. 177