10C3(12)10{ }^{10} C_{3}\left(\frac{1}{2}\right)^{10}10C3(21)10
10C3(12)3{ }^{10} C_{3}\left(\frac{1}{2}\right)^{3}10C3(21)3
10C3(12)7{ }^{10} C_{3}\left(\frac{1}{2}\right)^{7}10C3(21)7
10C3(12)8{ }^{10} C_{3}\left(\frac{1}{2}\right)^{8}10C3(21)8