In a fission reaction
23692U→ 117X+ 117Y+n+n
the average binding energy per nucleon of X and Y is 8.5MeV whereas that of 236U is 7.6MeV .
The total energy liberated will be about :
Total energy liberated is,
E=(234×8.5−236×7.6)
E=195.4MeV
E≈200MeV