In a group of \(60\) children, \(\dfrac{7}{12}\) are girls, \(\dfrac{2}{3}\) are right-handed, and \(\dfrac{2}{5}\) are right-handed girls. How many of the children are left-handed boys?
A. \(36\)
B. \(24\)
C. \(19\)
D. \(16\)
E. \(9\)
The OA is E
Source: Princeton Review