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Q39. If 21C11 = 20C11 + 20Cr, then the value of r is:

Mathematics — NUST Mock By Dogers 6 — Question 39 of 200

A. 11
B. 20
C. 21
D. 10

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If 21C11 = 20C11 + 20Cr, then the value of r is: | Mathematics MCQ #39 | Examora | Examora