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Q.

If  nC2017:nC2018=2018:2017, then the value of  n is

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a

2018

b

4035

c

2017

d

4034

answer is B.

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Detailed Solution

nc2017nc2018=20182017ncrncr1=nr+1r

2018n2018+1=20182017

n2017=2017

n=2(2017)

=4034

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