MathematicsMedium64×since 2002Q2967The value of 50C4+∑r=1656−rC3\,{}^{50}{C_4} + \sum\limits_{r = 1}^6 {^{56 - r}} {C_3}50C4+r=1∑656−rC3 isA55C4{}^{55}{C_4}55C4B55C3{}^{55}{C_3}55C3C56C3{}^{56}{C_3}56C3D56C4{}^{56}{C_4}56C4Check answerSkip