中文讲解 KSSM | Form 5 Add Maths Chapter 4 :Permutations & Combinations【Part 1 】

[@teyuenbing8400]

老师教的真的很清楚，就连我完全没碰过permutation 的人也很明白，谢谢老师！！！

[@BellaMaths]

不客气😊

[@karina-xz5dg]

can you do the english version?🥺 i really need it😭

[@GohKhengWee]

The answer for example 5 should be 2P1x3P2x2P1 + 2P1x3P2x3P1 = 60, isn't it? The answer given is for 3 digits instead of digits.

[@limhuitengmoe]

but the answer i got is 2P1x3P2x2P1 + 1P1x3P2x3P1 = 42, cuz for the second arrangement, only 9 must be in front to be able to put 8 as the last digit right?

[@rezekymaylani1799]

老师，感谢！❤️🥰

[@BellaMaths]

不客气😊

[@josh6438]

谢谢教学

[@chingxiao6281]

老师，example 3 应该不是用2p2 x 3p3 x 4p4 吗？

[@TITITITI-be8ib]

7:15

[@yixin-q8k]

老師爲什麽example3 boxes不是用C是P

[@mochi1514]

老师，请问ex 2的c 可以2p2 x 2p2 吗？

[@fangyl7003]

作答时一定要画图吗老师

[@BellaMaths]

是的哦

[@reneengkaizen8903]

老师，请问有更快一点的算法吗？

[@BellaMaths]

同学，你指那一题呢？

[@reneengkaizen8903]

@@BellaMaths 老师，就是要找有几个排发。如果我不要用listing 的话，有什么更快的方法吗？

[@BellaMaths]

@@reneengkaizen8903可能有噢，不过我没去研究，太复杂的方式可能会让学生更一头雾水吧。＞＜

[@reneengkaizen8903]

@@BellaMaths 好的，谢谢老师

[@ELI-kn6zu]

I hope that would be English

[@_Janise]

老师，请问permutation的第一题b)是不是有错 难道不是3P1 x 2P1 吗？如果问错请老师解答我的问题噢 谢谢老师

[@yoyo3347]

你错

[@nabilahsalzu9946]

I hope you can teach in English

[@BellaMaths]

will try my best ya...thanks for the feedback

[@grimreaper7062]

Please speak english😭😭