if ^{n}P_{13}:^{(n+1)}P_{12}=3:4 then ‘n’ is __________:

CA CPT Dec 2017 Question Paper Quantitative Aptitude for online practice

Question : 13 of 50

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^{n}P_{13}:^{(n+1)}P_{12}=3:4

then ‘n’ is __________:

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