JEE Math Practice Question
$$\sum\limits_{k = 0}^6 {{}^{51 - k}{C_3}} $$ is equal to :
- A.$$\mathrm{{}^{51}{C_4} - {}^{45}{C_4}}$$
- B.$$\mathrm{{}^{51}{C_3} - {}^{45}{C_3}}$$
- C.$$\mathrm{{}^{52}{C_3} - {}^{45}{C_3}}$$
- D.$$\mathrm{{}^{52}{C_4} - {}^{45}{C_4}}$$
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