The value of \( \left({ }^{7} C_{0}+{ }^{7} C_{1}\right)+\left({ }^{7} C_{1}+{ }^{7} C_{2}\right...
The value of \( \left({ }^{7} C_{0}+{ }^{7} C_{1}\right)+\left({ }^{7} C_{1}+{ }^{7} C_{2}\right)+\ldots+\left({ }^{7} C_{6}+{ }^{7} C_{7}\right) \) is
(A) \( 2^{7}-1 \)
(B) \( 2^{8}-2 \)
(C) \( 2^{8}-1 \)
(D) \( 2^{8} \)
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