SSC GD 2023 PYQ — Question 57

The correct answer is option 1 i.e. (iv)

Concept Used:

Effective discount of two successive discounts = a + b - $ab \over 100$

Also, discount = ${free\ articles \over total\ articles} \times 100$

Explanation:

According to the given question,

(i) Two successive discounts of 10% and 20%

Effective discount = 10 + 20 - ${10 \times 20} \over 100$ = 28%

(ii) Buy 1 get 1 free

Effectuve discount = ${1 \over 2} \times 100$ = 50%

(iii) Buy 5 get 3 free

Effective discount = ${2 \over 8} \times 100$ = 25%

(iv) Buy 5 get 6

Effective distance = ${1 \over 11} \times 100$ = 9.09%

Hence the required answer is (iv).