P of selecting point on the shaded region = shaded area/whole area
P( selecting point on the shaded ) = ( the four shaded circles ) / the whole square
P of selecting point on the shaded = ( 4 * ( π * r^2 ) )/ x^2
P of selecting point on the shaded = ( 4 * ( π * (x/4)^2 ) )/ x^2
P of selecting point on the shaded = ( 4 * ( π * x^2/16 ) )/ x^2
P of selecting point on the shaded = ( π * x^2/4 )/ x^2
P of selecting point on the shaded = x^2( π/4 )/ x^2
P( selecting point on the shaded ) = π/4 ≈ 0.7854 ≈ 79%
=80%
D is right option hope this helps
