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coxbazar divisional 2014 Q.no.-2

Posted: Sat Dec 12, 2015 6:31 pm
by Mahfuz Sobhan
Hasib went to the kite festival with five friends and bought 12 kites. They were all of different colors. He and his friend Tahmid took 2 kites and told the others to pick any one among other kites. In how many ways can they do it?

Re: coxbazar divisional 2014 Q.no.-2

Posted: Thu Dec 15, 2016 7:25 pm
by SYED ASHFAQ TASIN
Hasib Tahmid could take in (12c 2) way.Then there will be 10 kites.Others can take (10c3)ways.So,there is (12c2)*(10c3)ways. IS IT RIGHT?

Re: coxbazar divisional 2014 Q.no.-2

Posted: Mon Feb 18, 2019 4:33 pm
by samiul_samin
SYED ASHFAQ TASIN wrote:
Thu Dec 15, 2016 7:25 pm
Hasib Tahmid could take in $(12c 2)$ way.Then there will be $10$ kites.Others can take $(10c3)$ways.So,there is $(12c2)×(10c3)$ways. IS IT RIGHT?
Yes, you are right. Answer=$\dbinom {12}{2} ×\dbinom {10}{3}=7920$