Mathematics · Algebra
The value of (21C1 - 10C1) + (21C2 - 10C2) + ... + (21C10 - 10C10) is: (where nCr represents the binomial coefficient)
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1221 - 211
- 2220 - 210✓
- 3220 + 210
- 4221 - 210
Correct answer
220 - 210
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