We can get
the probability by 1st calculating the area of the shaded triangle
region and the area of the square.
Area of
triangle = b h / 2
Where,
b = h = half
of side length of square = 9 mm
Area of triangle
= 9 mm * 9 mm / 2
Area of triangle
= 40.5 mm^2
Area of
square = s^2
Area of
square = (18 mm)^2
Area of
square = 324 mm^2
Probability
that a point is in the shaded region = Area of triangle / Area of square
= 40.5 / 324
= 0.124
ANSWER: The
closest answer is letter C. 0.125
