Mathematics, 08.12.2020 21:00 kevonmajor

There are three dials on a combination lock. Each dial can be set to one of the numbers 1,2,3,4,5. The three digit number 553 is one way the dials can be set , as shown in the diagram. (a) Work out the number of the different three digit numbers that can be set for the combination lock. (b) How many of the possible three digit numbers have three different digits.

There are three dials on a combination lock. Each dial can be set to one of the numbers 1,2,3,4,5.

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There are three dials on a combination lock. Each dial can be set to one of the numbers 1,2,3,4,5. T...

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Ok so what even is this? I'd like a full explanation so that I can answer it myself it in the future. Thanks!

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