In a group of persons travelling in a bus, 6 persons can speak Tamil, 15 can speak Hindi and 6 can speak Gujarati. In that group none can speak any other language. If 2 persons in the group can speak two languages only and one person can speak all the three languages, then how many persons are there in the group ?
A
21
B
22
C
23
D
24
Correct Answer: Option C
Explanation
Let's solve this using the 'Sum of Parts' logic established in the 2014 paper [56].
1. **Calculate the