Permutations where items are restricted to the ends : ExamSolutions

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[grantleishman]

Man this playlist is EXACTLY what I needed. You're a legend!

[usamabinmuzaffar]

5:26 "Three blue blooks"🤣...I'm sorry but when I'm doing math anything can be funny to me

[eileenmuller]

This is the first time I have understood this concept. Thank you!

[bZk]

Needless to say, I can't thank you enough for these videos!

[booyaka]

Just in time! My Statistics exam is on Thursday and by far the most difficult part to understand was Permutations and Combinations, I just watched the whole series and with a little bit of practice, I'll be great in it. Thanks Mr. Stuart! :)

[ExamSolutions_Maths]

@booyaka3 Well done - there are more vids on this still to come though. Hope you find them useful.

[inesbacalhau]

Thank you! you helped a lot!! Have my test tomorrow!

[Vayanovic]

you are awesome, can't wait to get an A and be an addition to your list of

[ExamSolutions_Maths]

What do you mean when you say N and T's are together. Do they have to be NNTT or can they be mixed, say NTTN ?

[fahadshoaib]

At 1:40 what if we have 3 numbers (instead of 2 men) in which 2 numbers are similar.

[chetenerio]

in the first example, you wont mutiply it by 2? cause you can change the position of the men like (2x3x2x1x1)2 or....

[fancyworld]

Can you please help with this question:

The 4 tenors and 4 basses in the group stand in a single line with all the tenors next to each other and all the basses next to each other. How many possible arrangements are there if three of the tenors refuse to stand next to any of the basses?

[nehalingareddy]

Thanks! Wondering if you have anything for IB math HL?

[guyguy]

Is the book example correct? Why can't the remaining 5 books (2 red, 3 blue) be organised between themselves and so why don't you divide by 3! and 2!. Sure you're right but I'm a bit confused by this. Thanks, for any help.

[ExamSolutions_Maths]

I see what you mean but the intension was to restrict them to both ends.

[ShaquilleKerr]

Find how many arrangements of the letters of the word TRANSITION are possible if the Is, Ns and Ts are together please help

[god]

IN THE SECOND QUESTION SHOULDN'T 1440 BE MULTIPLIED BY 2? BECAUSE YOU CAN SWITCH THE TWO RED BOOKS AT THE ENDS?

[malm]

in the second question why cant we place each two red books on each end like 4, 3, 3, 2, 1, 2, 1 where 4, 3 and 2, 1 at ends are for red books and 3, 2, 1 for blue so we get in total 144 ?

[ambreenrehan]

How can you fit 5 blue books, when you're given only 3 blue books? And what about the rest of the 2 red books other than the ones on the two ends? Do we just not use them? @ExamSolutions

[SaimYT]

What if the question says one end must be blue and one must be of red book?? Please help I have a test tomorrow and I'mstuck on a similar question