Let x : Number of persons reading only Anandbazar

y : Number of persons reading only Ganashakti

z : Number of persons reading both

Hence ,

x + 2y + z = 65

x + y + z = 52

==> y = 13

Hence ,

x + z = 52 - 13

= 39

**Hence , number of persons reading only 1 newspaper in Aghosh Colony = 39 **