Q: 18 (CAPF/2008)

The average score of three boys in Mathematics is 30. When the score of a fourth boy is added to the total score of the three boys, the average is lowered to 25. What is the score of the fourth boy ?
question_subject: 
Logic/Reasoning
question_year: 
2008
question_exam: 
CAPF
stats: 
0,96,136,96,80,16,40