Question and Answers Forum

All Questions      Topic List

Permutation and Combination Questions

Previous in All Question      Next in All Question      

Previous in Permutation and Combination      Next in Permutation and Combination      

Question Number 177007 by Ar Brandon last updated on 29/Sep/22

Answered by mr W last updated on 29/Sep/22

$$1.hebuysthe{13}^{th}floor:$$$${12}^{th}floorisalsobought.tobuythe$$$$rest6floorsthereare{C}_6^{11}=462ways.$$$$2.he{doesn}^{\prime }tbuythe{13}^{th}floor:$$$$tobuy8floorsthereare$$$$C_8^{12}=495ways.$$$$totallythereare462+495=957ways$$$$tobuy8floors.$$

Commented by Ar Brandon last updated on 29/Sep/22

Thank you, Sir !

Commented by Tawa11 last updated on 02/Oct/22

$$\mathrm{Great}\mathrm{sir}$$

Terms of Service

Privacy Policy

Contact: info@tinkutara.com