nCr/nPr=r!give proof.
It's 1/r! nCr = n! / r!(n-r)! nPr = n! / (n-r)! If you divide the two you'd have: n! / r! (n-r)! * (n-r)! / n! = 1/r!I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!