Quantitative Aptitude Permutation and Combination

ಒಂದು ವೇಳೆ \(^{15}C_{3r} = ^{15}C_{r + 3}\) ಆಗಿದ್ದರೆ, ನಂತರ 'r' ಯಾವುದಕ್ಕೆ ಸಮವಾಗಿರುತ್ತದೆ?

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