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Class 11
Maths :-NCERT Solutions - Permutations And Combinations.

Page No 141:
Question 5:
Evaluate, when
(i) n = 6, r = 2 (ii) n = 9, r = 5


Answer:


(i) When n = 6, r = 2, 
(ii) When n = 9, r = 5, 


NCERT Maths Class 11

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