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Q1 of 68 Page 330

Evaluate:
⁹⁰C₈₈

We know that:

ⁿC_r =

⇒⁹⁰C₈₈=

⇒⁹⁰C₈₈=

⇒⁹⁰C₈₈=

⇒⁹⁰C₈₈=

⇒⁹⁰C₈₈=

⇒⁹⁰C₈₈=

⇒⁹⁰C₈₈=4005

Ans: ⇒⁹⁰C₈₈=4005

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