This is not correct. It is not taking into account the 150 employees.
60% if there are only 10 white and black balls
the answer is 60000 to the nearest 1000
A=x
B= 2x
C=3x
If you add them up =
6x =180
÷6 both sides
x=30
A=30
B=60
C=90
one angle is 90 degrees so the triangle is classified as a right triangle