【中五數學Tips】F.5 Math Permutation & Combination排列與組合｜Beyond Math 數學補習教育中心

[@nicolepeng-mt7gt]

多謝噻，好有用！

[@kahong7051]

Good 😊

[@taeTae-yo5dt]

Thanks

[@sunyuecheung7528]

Dear sir,why you say that handsome boy is lonely on the line at first... what do you mean?