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Mathematics 9 Online
OpenStudy (anonymous):

A combination lock will open when the right choice of three numbers (from 1 to 36) is selected. How many different lock combinations are possible?

OpenStudy (anonymous):

36x35x34

OpenStudy (anonymous):

It doesn't say all three have to be different... this isn't "without replacement"

OpenStudy (anonymous):

36x36x36 is this multiple choice?

OpenStudy (anonymous):

ya. then 36^3

OpenStudy (anonymous):

That should be correct... 36 * 36 * 36 = 36^3 36 choices for the first #, and for each of those, 36 choices for the 2nd #, and for each of those, 36 choices for the last number

OpenStudy (anonymous):

A. 39,304 B. 117,912 C. 34 D. 102 here are my options if it were (1 to 34)

OpenStudy (anonymous):

Is it 34 or 36? 34^3 is option A

OpenStudy (anonymous):

okay thank you so much!

OpenStudy (anonymous):

option A!

OpenStudy (anonymous):

I'm confused about where the 34 came from though... the problem said numbers 1-36

OpenStudy (anonymous):

the original problem is the type of problem except i had different numbers (from 1 to 34)

OpenStudy (anonymous):

sorry for the confusion

OpenStudy (anonymous):

oh :) Ok, got it. Yes, it's just the number of choices for each number all multiplied together. So if you had a combo lock with 10 numbers, you would have 10 * 10 * 10 possible combinations. etc.

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