Math, asked by natasha7085, 5 months ago

If 20c3 + 20c4 + 21c5 = 22cr
Then, r =?

(Permutations and combinations)

Answers

Answered by wwwsaru2004

0

Answer:

cjjehrdjsjwbdhzjsjsbsjjssbsjskskdmms

Step-by-step explanation:

sndbdndjskzksmwsnjznssnnznsnwjdjzskkwke

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