alleryStart learning →What is the sum 6C0 + 6C1 + 6C2 + 6C3 + 6C4 + 6C5 + 6C6?
A36
B128
C64
D32
Answer & Solution
Correct answer: C. 64
The sum of all k-combinations of n items is 2^n, so 2^6 = 64.
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