Permutations of r items taken from n, nPr : ExamSolutions

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[@ferlyntaho9289]

Slow maths explanations are so therapeutic.

[@ExamSolutions_Maths]

That's ok. Pleased to hear it helped

[@sidhuscreate4666]

Sir please 🙏 tell about p(20,r)=????

[@ddesilva9976]

can you please tell me the answer for this question? i have already done it but i am not sure about the answer.
A child's game uses five brisks. one is blue, one is green, one is yellow and two are white. the five brisks are arranged in a line
1) how many different possible arrangements of the colors are there?
2) assuming that all the arrangements in part 1 are equally likely, find the probability that the two white bricks are at the end of the line.

[@shahin023]

Thank you sir

[@ExamSolutions_Maths]

@Nicola72av Thanks as always

[@ThekestoN1]

I would divine 840 by factorial of 4, because it is not said that it matters how people sit, i mean the seats dont have their qualities like first or second third and forth, or maybe i just dont understand what at a time means.

[@CSS_Mustafeez]

those 6 people who disliked this must be cavemen

[@naeemsarwarmirza835]

thank you for sharing this video sir, it helped a lot

[@usmanmehmood7614]

thanks for your explanation

[@pemba5044]

you are awesome>>i dint understand anything above for my whole 1 and half year of highschool ..and after seeing this video i got it well :D

[@emanawel9224]

GREAT EXPLANATION!!!

[@Legolas25079]

Brilliant!! Thank you ever so much!!

[@AddHazers]

I have the exact same calculator, so it benefit me alot

[@NathanDuescher]

thank you

[@NirajBind]

Thanks

[@sitaramgoswami1146]

NPR=840,NCR=35to n =?

[@MrWearethechampion]

Nice

[@Sealed14X]

Yet another Dear Thank You!! ;P

[@IKyt-nf5jx]

you're so cool

[@ddesilva9976]

can you please tell me the answer for this question? i have already done it but i am not sure about the answer.
A child's game uses five brisks. one is blue, one is green, one is yellow and two are white. the five brisks are arranged in a line
1) how many different possible arrangements of the colors are there?
2) assuming that all the arrangements in part 1 are equally likely, find the probability that the two white bricks are at the end of the line.