College Math MCQs – Certification Test 497

Complementary Combination Trivia (Question 497) – App & e-Book Download

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MCQ 497: The value of ^n-1C_r-2 + ^n-2C_r-1 is:

ⁿ⁺¹C_r
ⁿC_r
ⁿC_r-1
^n-1C_r-1

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