In a class of 35 students 29 play droughts,16 play chess and 10 play both droughts and chess what's the number of students who play droughts only and chess only???

Answer 1

29 - 10 = 19 droughts only
16- 10 = 6 chess only.

if you were using a Venn Diagram

two circles intersection with
the 10 in the intersection

19 in the drought only part of the first circle

6 in the chess only part of the 2nd circle.

That will add to 35.

Answer 2

I think that's draughts, not droughts!

Just my dry wit...