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The value of (21C1 - 10C1) + (21C2 - 10C2) + (21C3 - 10C3) + (21C4 - 10C4) +...+ (21C10 - 10C10) is

(a) 221 - 211

(b) 221 - 210

(c) 220 - 29

(d) 220 - 210

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Correct option (d) 220 - 210

Explanation:

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