The value of ${}^{50}{C_4} + \sum\limits_{r = 1}^6 {^{56 - r}{C_3}} $ is
The value of ${}^{50}{C_4} + \sum\limits_{r = 1}^6 {^{56 - r}{C_3}} $ is
- [AIEEE 2005]
- A
$^{56}{C_3}$
- B
$^{56}{C_4}$
- C
$^{55}{C_4}$
- D
$^{55}{C_3}$
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