The sum of \( 20 C 8 + 20 C 9 + 21 C 10 +... - Solved

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Question 23

Mathematics Binomial Theorem Medium

The sum of \( { }^{20} C_{8}+{ }^{20} C_{9}+{ }^{21} C_{10}+{ }^{22} C_{11}-{ }^{23} C_{11} \) is

(A) \( { }^{22} C_{12} \)

(B) \( { }^{23} C_{12} \)

(C) 0

(D) \( { }^{21} C_{10} \)

✓ Correct Answer: Option C Verified Solution

Correct Option is C. Practice regular variations of this Binomial Theorem concept to build speed and accuracy.

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