Find the effective discount for the scheme 'buy 10, get 6 free'.

Correct option is B

Given:
Number of items bought = 10
Number of items free = 6
Formula Used:
$$\text{Discount \%}=\frac{\text{Free items}}{\text{Total items}}\times100$$​​
Solution:
Total number of items received = 10 + 6 = 16
Effective Discount = $$\left(\frac{6}{16}\right)\times100=37.5\%$$​​