IDNStudy.com, ang iyong gabay para sa malinaw at eksaktong mga sagot. Tuklasin ang malalim na sagot sa iyong mga tanong mula sa aming komunidad ng mga bihasang propesyonal.


3. In how many ways can the Principal and the 8 Headteachers of the different
departments be seated in a round table for their staff meeting?
4. Sheina has 10 different keys. In how many ways can she arrange the keys in
a key chain?​


Sagot :

3.5040

4.1

3.circular permutation problem

formula-(n-1)!

(8-1)!=7!

7*6*5*4*3*2*1

=5040

4.combination

C(n,r)=n!/r!(n-r)!

=10!/10!(10-10)!

=10!/10!0!

=1