Question

if nc2017:nc2018=2018:2017,then value of n is​

Answer 1

Step-by-step explanation:

$We have for nCr=nCn−r.</p><p></p><p>Now given</p><p></p><p>nC12=nC8</p><p></p><p>or, nCn−12=nC8</p><p></p><p>⇒n−12=8</p><p></p><p>or, n=20.</p><p></p><p>Then nC17</p><p></p><p>=20C17</p><p></p><p>=20C20−17</p><p></p><p>=20C3</p><p></p><p>=3.2.120.19.18</p><p></p><p>=20.57</p><p></p><p>=1140</p><p></p><p>$

this is your answer dear plz mark as a brain list plz plz plz plz plz plz plz plz plz plz plz plz plz plz plz plz plz plz plz plz plz plz plz plz plz plz