how many different ways this selection can be done?

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Tutor: None Selected Time limit: 1 Day

If a student can select 5 novels from a reading list of 20 for a course in literature (The order is important).

May 28th, 2015

Use permutation since the order matters

the answer is

20P5=1,860,480

May 28th, 2015

can you explain how you got the answer

May 28th, 2015

permutation is given by

nPk=n!/(n-k)!

using the above formula you can easily get the answer

Alternatively using a calculator

you can obtain the answer direct by pressing

20 shift then nCr button and 5

May 28th, 2015

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May 28th, 2015

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