Correct Answer - Option 1 : 8
Given:
Alpha brought 6 sandwiches.
Beta brought 4 sandwiches.
While Gamma brought only of Rs. 10
Formula Used∶
Simple concept of ratios
Calculation∶
Number of sandwiches = 10
So, the amount eaten by each of the three is 10/3 sandwiches
Since Gamma paid Rs. 10 for 10/3 sandwiches,
Price for 1 sandwich = 10 × 3/10 = Rs. 3
Alpha should get back from Gamma what Alpha did not eat i.e. 6 - 10/3 = (18 - 10)/3 = 8/3 of sandwich
Alpha should get = (8/3) × 3 = Rs. 8
∴ Alpha should get Rs. 8.