In a community group of a society, 65% of the residents were Christians and 50% were Adivasis. If every resident is either Christian or Adivasi or both, then calculate the percentage of residents belonging to both the community.

Answer 1:

Christains = 65%

Adivasis = 50%

Let x% residents belong to both the communities.

Therefore, 100+x = 65+50

x = 15%