[PPSC Naib Tehsildar 2022]

7. On buying a pen, the shopkeeper gives three refills free. On buying a pen and six refills, the shopkeeper gives additional four refills free. If the equivalent discount is the same in both cases, then how many refills will be equal in value to a pen ?

1. 18

2. 24

3. 15

4. 20

Correct Answer :

18