Question 26420
Let number of correct answers be "x"
The number of wrong answers is "25-x"
#of points from right answers is 3x
#of points from wrong answers is -5(25-x)=125-5x
EQUATION:
Pts + Pts= 27
3x-125+5x=27
8x=152
x=19 (# of correct answers)
25-x=6 (# of wrong answers)

Cheers,
Stan H.