RRB Group-D Model Paper 14 with answers for online practice

Given:
1) 70% of students attend paper of Hindi = 30% attend only English
2) 50% gave paper of English = 50% attend only Hindi
Calculations:
⇒ Students who attend only one paper = 30% + 50% = 80%
∴ Students who attend both papers = 100% - 80% = 20%