JEE Math Practice Question
The value of $$\,{}^{50}{C_4} + \sum\limits_{r = 1}^6 {^{56 - r}} {C_3}$$ is
- A.$${}^{55}{C_4}$$
- B.$${}^{55}{C_3}$$
- C.$${}^{56}{C_3}$$
- D.$${}^{56}{C_4}$$
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