if nPr =2520 and nCr =21,find r Share with your friends Share 3 Prarthana answered this nPr=2520 and nCr=21 we know tht nPr = nCr . r! = 2520 = 21 . r! r! = 2527/21 r! = 120 r = 5! 2 View Full Answer Aditya Agrawal answered this Please see answer below -1 Yash Adak answered this Utdvnkfsbn -4 Yash Adak answered this 120 is the value of r 1 Yash Adak answered this Sorry its 5!=120 -3 Mayank answered this nCr=2520nPr=21 we know nPr=nCr*r! 2520=21*r! r!=120 r=5 -3 Arman Alam answered this Arman -6